Windsurf

Key Terms

• Devin Desktop - the IDE formerly known as Windsurf, relaunched June 2, 2026. A full VS Code-compatible IDE with an "Agent Command Center" (a Kanban view for managing fleets of local and cloud agents) built in. Existing Windsurf users received it as an over-the-air update with no change to plan or pricing. Source: Windsurf – Windsurf Is Now Devin Desktop
• Agent Command Center - the default surface in Devin Desktop. A single Kanban view for dispatching and monitoring local agents, cloud agents, and third-party agents from one place. Source: Windsurf – Windsurf Is Now Devin Desktop
• Spaces - a new Devin Desktop feature for sharing context between agents, grouping sessions, PRs, files, and context together. Source: Windsurf – Windsurf Is Now Devin Desktop
• Agent Client Protocol (ACP) - an open-source protocol that lets any compatible agent run inside any ACP-compatible editor. At launch Devin Desktop supports Codex, Claude Agent, OpenCode, and in-house agents. Third-party agents appear in the same Kanban view as Devin. Source: Windsurf – Windsurf Is Now Devin Desktop
• Devin Local - the successor to Cascade as Cognition's primary local agent, completely rewritten in Rust. Up to 30% more token-efficient than Cascade and supports subagents. Legacy Cascade remained available through July 1. Source: Windsurf – Windsurf Is Now Devin Desktop
• Cascade - Windsurf's original local AI agent that ran inside the IDE (Code, Ask, Plan modes). Now superseded by Devin Local as of June 2, 2026. Source: Windsurf – Windsurf Is Now Devin Desktop
• Devin Cloud - Cognition's cloud-based agent that runs in its own VM and works asynchronously on tasks, tests, and PRs. Available on Pro and higher plans. Source: Windsurf – Pricing
• SWE-1.6 - Cognition's latest proprietary model for software engineering agents, released April 7, 2026. Free tier runs at 200 tok/s via Fireworks; paid tier at 950 tok/s via Cerebras. Free for the first 3 months (through approximately July 7, 2026). Source: Cognition – Swe 1 6
• FrontierCode - Cognition's proprietary benchmark that measures whether model output would actually be merged by open-source maintainers (correctness, test quality, scope, style, codebase standards). Three nested subsets: Extended (150 tasks), Main (100), Diamond (50 hardest). Built by 20+ maintainers spending 40+ hours per task. Cognition claims an 81% lower false-positive rate than SWE-Bench Pro. Source: Cognition – Frontier Code
• Devin Fusion - a multi-model harness released June 29 (preview) that runs a frontier "main" model and a cheaper "sidekick" model in parallel, delegating routine work to the sidekick to cut cost. Cognition reports 35% lower cost than a pure frontier harness at matched FrontierCode Extended performance. Source: Cognition – Devin Fusion
• Sidekick - the architecture behind Devin Fusion. A small, cheaper agent runs in parallel with a frontier agent, each maintaining its own cached context. The frontier agent delegates mechanical work and monitors, retaining the significant decisions. Source: Cognition – Devin Fusion
• AI Productivity Guarantee - an enterprise program announced June 4. An agent estimates Devin's productive engineering output in hours, validated against user self-reports. If delivered value falls short of consumption near contract end, Cognition funds usage up to $10M. Source: Cognition – Ai Guarantee
• Token-based billing - charges based on input and output tokens. Extra usage on paid plans is billed at per-model API rates shown in the IDE's model picker, not on the public pricing page. One token is roughly 4 characters or 0.75 words. Source: Windsurf – Pricing

Latest Changes

Changes since the 2026-05 report.

• Rebrand: Windsurf was relaunched as Devin Desktop on June 2. The IDE foundation is unchanged (VS Code-compatible, backwards-compatible extensions and keybindings), but it adds the Agent Command Center Kanban view, Spaces for shared agent context, and ACP support for third-party agents (Codex, Claude Agent, OpenCode). Existing plans, pricing, and extensions carried over unchanged. Source: Windsurf – Windsurf Is Now Devin Desktop
• Local agent rewrite: Devin Local replaces Cascade as the primary local agent, rewritten in Rust, up to 30% more token-efficient, and supporting subagents. Legacy Cascade was available through July 1 for incremental migration. Source: Windsurf – Windsurf Is Now Devin Desktop
• New benchmark: FrontierCode launched June 8, measuring code mergeability rather than just correctness. Best model (Claude Opus 4.8) scores only 13.4% on the hardest Diamond subset. See Model Performance. Source: Cognition – Frontier Code
• New product (enterprise): AI Productivity Guarantee announced June 4. Cognition will fund enterprise usage up to $10M if Devin's estimated engineering-output value falls short of consumption by contract end. Devin is described as model-independent. Source: Cognition – Ai Guarantee
• New harness (preview): Devin Fusion released June 29 as a preview in Devin Cloud. A sidekick + dynamic mid-session routing harness that Cognition reports maintains frontier performance at 35% lower cost on FrontierCode Extended (41% lower cost when paired with Fable 5). Source: Cognition – Devin Fusion
• New model (third-party): Claude Sonnet 5 added June 30 across Devin Desktop and CLI. It outperforms Opus 4.8 on FrontierCode Extended (53.8% vs 51.8%) and uses roughly 30% less quota than Sonnet 4.6 through August 31, 2026, then reverts to the same quota as Sonnet 4.6. Source: Windsurf – Claude Sonnet 5
• New models (open-weight): Kimi K2.7 and GLM 5.2 added June 24 across Devin Desktop and CLI. Both are free (no quota consumption) for Pro, Max, and Teams plans until July 5. GLM 5.2 scores 43.0% and Kimi K2.7 scores 39.5% on FrontierCode Extended. Source: Windsurf – Kimi K27 Glm 52 Devin Desktop
• Feature added: Security in Devin Review went live June 18. Every PR now gets a security review that catches auth bypasses and logic flaws pattern-matching scanners miss, classifies findings by severity with CWE IDs, and writes the fix as a merge-ready PR. Source: Windsurf – Security In Devin Review
• Model removed (external): Claude Fable 5, added June 9 across Cloud, Desktop, and CLI, was removed June 12 following the US government export-control directive that suspended Fable 5/Mythos 5 at Anthropic. Devin Ultra mode continues to use the most powerful available models. Source: Windsurf – Claude Fable 5 Available In Devin
• Plan structure change: The Teams plan is now $80/month for the team plan plus $40/month per full developer seat, replacing the prior flat $40/user/month. It introduces unlimited "flex seats" that do not include their own quota. Source: Windsurf – Pricing
• Verified (May watch-item): SWE-1.6 promo still active, post-promo pricing still not announced. The pricing page (as of June 30) still lists SWE 1.6 as "Free" on all plans with the "Slow" annotation, and the Pro plan still advertises "Free use of SWE 1.6." The April 7 launch promised free use "for the next 3 months," putting the end at approximately July 7, 2026. Cognition has published no post-promo price and no extension. A Reddit-reported glitch on June 24 briefly showed SWE-1.6 Slow as a paid model before reverting to free, underscoring that the billing state is unstable this close to the deadline. Sources: Windsurf – Pricing , Cognition – Swe 1 6 , Old – Pricing For Swe16 Slow Changed From Relative Cost

Plans

Source: Windsurf – Pricing

Usage allowance details: Quotas are described only as "Light," "Increased/Standard," and "Significantly higher," with no published token counts, request limits, or credit amounts anywhere on the pricing page or FAQ. The FAQ states quotas "refresh automatically on a daily and weekly basis" but gives no amounts. This is a transparency gap. Source: Windsurf – Pricing

Teams plan structural change: The Teams plan moved from a flat per-user fee ($40/user/month in May) to a $80/month base plus $40/month per "full dev seat," with unlimited non-quota "flex seats." Each full user includes their own quota and full Devin access. Source: Windsurf – Pricing

Extra usage: On paid plans, users can purchase extra usage beyond included quota at per-model API rates shown only in the IDE's model picker, not on the public pricing page. Source: Windsurf – Pricing

Free trial: Not listed on the current pricing page. (May's report noted a 2-week Pro trial for first-time users, restricted to SWE-1.5 only per Reddit; this is no longer surfaced on the pricing page.)

API Pricing

Devin does not offer standalone API access to its proprietary models (SWE-1.6, SWE-1.5). Usage is through Devin Desktop, Devin Cloud, Devin CLI, or the Devin API (available on Pro and higher). Extra usage on paid plans is billed at per-model API rates visible only in the IDE's model picker, not on the public pricing page.

Per-token dollar rates for third-party models are not published on the web. Cognition expresses relative cost in quota units rather than dollars. The one verifiable per-token data point is relative quota: through August 31, 2026, Claude Sonnet 5 uses roughly 30% less quota than Claude Sonnet 4.6 in Devin Desktop and CLI, then reverts to the same quota as Sonnet 4.6. Source: Windsurf – Claude Sonnet 5

Devin Fusion cost data (internal benchmarking, FrontierCode Extended): Cognition's own cost-per-task measurements, useful as the only published per-task dollar figures:

Source: Cognition – Devin Fusion

Per-model API rates for other models (Opus 4.8, GPT-5.5, Gemini 3.5 Flash, Kimi K2.7, etc.) are visible in the IDE's model picker but not published on the web pricing page. This is a transparency gap.

Model Performance / Benchmarks

Cognition launched its own benchmark, FrontierCode, on June 8. It measures whether a model's output would actually be merged by open-source maintainers, not just functional correctness. Scores are reported as a weighted aggregate of rubric items, where solutions that fail blocking criteria receive 0. Each model is run 5 times at every available reasoning effort, reporting the best-performing effort. Source: Cognition – Frontier Code

FrontierCode Extended (full 150 tasks)

Sources: Windsurf – Claude Sonnet 5 , Windsurf – Kimi K27 Glm 52 Devin Desktop

FrontierCode Main (100 hardest tasks) and Diamond (50 hardest)

Source: Cognition – Frontier Code

SWE-1.6 score: Cognition's own proprietary model SWE-1.6 scores 18.4% on FrontierCode Extended, the lowest of any model Cognition benchmarked, including its own predecessor tier and all third-party models. Cognition does not publish exact SWE-Bench Pro scores for SWE-1.6, claiming only "comparable performance to the Preview model" and that SWE-1.6 Preview improved on SWE-1.5 by more than 10% on SWE-Bench Pro. Sources: Windsurf – Claude Sonnet 5 , Cognition – Swe 1 6

Devin Fusion benchmark: The Fusion harness (no Fable 5) reaches a FrontierCode Extended score of 47.9 at $2.38/task, versus Opus 4.8 (high) at 48.8 at $3.24/task, a 35% cost reduction at near-matched performance. Internally, Cognition reports 88% of merged PRs from Fusion-enabled users were driven entirely by the automated router. Source: Cognition – Devin Fusion

Benchmark transparency note: FrontierCode is Cognition's own proprietary benchmark; the tasks are not released publicly to avoid contamination. Scores are self-reported and not independently reproducible. Cognition itself notes "these relative rankings may change slightly with coming adjustments to FrontierCode." Source: Windsurf – Claude Sonnet 5

Latest News

Windsurf rebrands to Devin Desktop (June 2, 2026)

Cognition relaunched Windsurf as Devin Desktop, unifying the product under the Devin brand. The launch introduced the Agent Command Center (a Kanban view for managing fleets of local and cloud agents), Spaces (shared context between agents), and support for the Agent Client Protocol so third-party agents (Codex, Claude Agent, OpenCode) run inside the editor. Legacy Cascade migration window ran through July 1. Named design partners include Ramp, Harvey, NVIDIA, Modal, and Intact Financial. Source: Windsurf – Windsurf Is Now Devin Desktop

AI Productivity Guarantee announced (June 4, 2026)

Cognition introduced an AI estimator that measures Devin's productive engineering output in hours per session, validated against enterprise users' self-reported time estimates. For enterprise customers, if delivered value falls short of consumption near annual contract end, Cognition funds usage up to $10M. Devin is described as model-independent, using the right model per task. Source: Cognition – Ai Guarantee

FrontierCode benchmark launched (June 8, 2026)

Cognition published FrontierCode, a benchmark grading models on whether their code would be merged by open-source maintainers (correctness, regression safety, mechanical cleanliness, test correctness, scope, code quality). Built with 20+ maintainers across 36 repositories spending 40+ hours per task. Cognition claims an 81% lower false-positive rate than SWE-Bench Pro. Best model Opus 4.8 scores 13.4% on the hardest Diamond subset. Source: Cognition – Frontier Code

Claude Fable 5 added then removed (June 9 to June 12, 2026)

Fable 5 was made available in Devin across Cloud, Desktop, and CLI on June 9, earning the top score on FrontierCode. On June 12 it was removed following the US government export-control directive that suspended Fable 5 and Mythos 5 at Anthropic. All other models, including Opus 4.8 and GPT-5.5, remain available. Devin Ultra mode continues to use the most powerful available models. Sources: Windsurf – Claude Fable 5 Available In Devin , Anthropic – Fable Mythos Access

Security in Devin Review (June 18, 2026)

Every PR opened in Devin Review now gets an automatic security review. Devin reasons across the full repository to catch auth bypasses, business-logic flaws, and chained findings that pattern-matching scanners miss. Each finding is classified by severity, tagged with a CWE ID, and shipped with a remediation PR. Source: Windsurf – Security In Devin Review

Kimi K2.7 and GLM 5.2 added (June 24, 2026)

Kimi K2.7 and GLM 5.2 are now available in Devin Desktop and CLI. Both are free (no quota consumption) for Pro, Max, and Teams plans until July 5. GLM 5.2 scores 43.0% and Kimi K2.7 scores 39.5% on FrontierCode Extended, placing them in a competitive tier with GPT-5.5 (44.8%) and below Opus 4.8 (51.8%). Source: Windsurf – Kimi K27 Glm 52 Devin Desktop

Devin Fusion released as preview (June 29, 2026)

Devin Fusion is a multi-model harness using a frontier "main" agent plus a cheaper "sidekick" agent running in parallel, with dynamic mid-session routing triggered at context-compaction points to switch models cache-efficiently. Cognition reports 35% lower cost than a pure frontier harness at matched FrontierCode Extended performance (41% lower cost with Fable 5, which is currently unavailable). Available as a preview in Devin Cloud. Source: Cognition – Devin Fusion

Claude Sonnet 5 added (June 30, 2026)

Claude Sonnet 5 is live in Devin Desktop and CLI. It outperforms Opus 4.8 on FrontierCode Extended (53.8% vs 51.8%) and uses roughly 30% less quota than Sonnet 4.6 through August 31, 2026, after which it uses the same quota as Sonnet 4.6. Source: Windsurf – Claude Sonnet 5

Community Signals

Rebrand backlash: users question abandoning the Windsurf brand

The rebrand to Devin Desktop drew visible pushback on r/windsurf, where users associated the Devin name with its 2024 launch controversy and viewed Windsurf as the stronger brand. A thread titled "Rebranding Rant - Blowing Off Steam" (3 points, 62% upvoted, 10 comments) captured the sentiment. The original poster, eldentruth, asked: "Windsurf is now... Devin? 'You mean the one that made a splash in 2024 with misleading videos about its agentic capabilities?' ...yeah, that Devin. Why would Windsurf sacrifice its brand for such an obvious a downgrade in reputation?" Old – Rebranding Rant Blowing Off Steam . User letsgotgoing was blunter: "Windsurf is dead. Devin acquired the husk of it. If you are still a customer, you should try alternatives." Old – Otkkinr . A dissenting view from Bladder-Splatter argued the rebrand was an upgrade: "Windsurf already threw its reputation away when it hotswapped to quotas and brought the glorious 2 prompt work week to the forefront. So they probably swapped to a slightly higher reputation all things considered." Old – Ou1Itv3 . A separate thread, "What the HECK IS HAPPENING WITH DEVIN!?" (17 points, 19 comments), gathered broader confusion about the product direction. Old – What The Heck Is Happening With Devin

Quota exhaustion: a week of usage consumed in under two days

The single loudest June community theme is that undisclosed quotas are exhausted far faster than users expect, especially on frontier models. A thread titled "1 WEEK = 1.4 DAYS according to Windsurf" (14 points, 94% upvoted, 7 comments) showed users hitting weekly limits on the second day. User u_r_me gave a concrete data point using Opus 4.8 (high): "This is on the second day of usage for the week, 57% used. So my ratio was 1.57 days/week... I'm hitting these limits in just a couple of turns and couldn't even make one decent mod to just one of my programs (using Opus 4.8 high). This is the reason I just came to reddit just to see if this was real or perhaps it was a mistake; seems like they meant to do this, which is a bummer since it makes Windsurf unusable now. I have Claude Code as well, and that works great." Old – Ounidu4 . User EcstaticImport questioned the dual-quota design itself: "they want to slow your usage down, but I don't understand why they have two quotas, it just causes this exact confusion... these multi quotas systems are just confusing." Old – Oulvatr . A related thread, "Daily usage eats 72% of weekly" (8 points, 4 comments), reported the same pattern. Old – Daily Usage Eats 72 Of Weekly

SWE-1.6 billing glitch signals instability near promo deadline

Directly relevant to the May watch-item, a thread titled "Pricing for SWE-1.6 Slow changed from $$ relative cost to $ relative cost" (3 points, 67% upvoted, 7 comments) reported a transient billing change on June 24. User Proper_Patience8639, on the Pro plan, wrote: "yesterday it went from being free to being $$, and now it seems to be back to free. Thank God for that." Old – Ots1Dcv . User mik3lang3l0 confirmed: "I can confirm the bug, it appeared to all free models after an update, but after restarting the app it was resolved." Old – Otrxyjy . This is consistent with the free SWE-1.6 promotional period being in an unstable state as the unannounced end date approaches.

Devin Fusion reception: cautious interest, desktop availability confusion

The Devin Fusion announcement thread on r/windsurf (24 points, 100% upvoted, 10 comments) drew measured interest but surfaced confusion about where Fusion is usable. User ultrathink-art raised a substantive technical concern: "Routing cost savings are real only if the quality signal works. When a cheaper model fails on something that needed frontier reasoning, you typically pay for both the failed attempt and the expensive retry. Curious whether Devin Fusion detects mid-task failures and escalates, or only routes pre-task based on complexity estimates." Old – Oulxo1H . Cognition staff member mattbergland clarified scope: "It's only available in Devin Cloud. You can use it in Devin Desktop and Devin" Old – Ounzgn4 . User TacticalSniper noted a competitor already does similar routing: "Kiro does this quite well for a while. I'll be keen to check it out before my org moves off to Claude Code." Old – Oulbps8

AI Productivity Guarantee: HN skepticism about the estimator

The AI Productivity Guarantee drew limited HackerNews attention (4 points, 1 comment), but the single commenter questioned the measurement methodology. User nadis wrote: "Seems like a wild move from the Devin team. Very curious about the metrics going into their 'estimator' and also that they compared it to human estimates as a measure of success." News – Item

Failed sources

The Reddit JSON endpoint (old.reddit.com/...json) was not used; the standard old.reddit.com HTML pages loaded successfully for all threads cited above. The HackerNews story pages (news.ycombinator.com/item?id=48375212 and 48407036) returned HTTP 429 rate-limit errors on direct fetch, so comment content for those two threads was retrieved via the HN Algolia items API (hn.algolia.com/api/v1/items/) instead. All quotes carry their direct permalinks.

Enterprise Readiness

Additional certifications: SOC 2 Type 2, FedRAMP High. Source: Windsurf – Enterprise

New in June: The enterprise compare table now explicitly lists "Deploy in your virtual private cloud (VPC)," "SAML/OIDC SSO" (both protocols), "Centralized enterprise admin controls," and "Teamspace isolation." The AI Productivity Guarantee (up to $10M funded usage) is an enterprise-only commitment. Sources: Windsurf – Pricing , Cognition – Ai Guarantee

Terms explained:

• SCIM - a protocol for automatically provisioning and deprovisioning user accounts from a corporate directory (e.g., Okta, Azure AD) to a SaaS tool. Without SCIM, IT teams must manually create and remove accounts. Datatracker – Rfc7644
• IP indemnity - the provider covers your legal costs if their AI output infringes a third party's copyright.
• CWE ID - a Common Weakness Enumeration identifier used to classify the type of security vulnerability a finding represents (e.g., CWE-307 for broken authentication). Source: Windsurf – Security In Devin Review

Transparency Gaps