Cursor Composer 2 Released · Chronopin

Composer family pricing per million tokens

Model	Input	Output
Composer 1.5	$3.50	$17.50
Composer 2 Standard	$0.50	$2.50
Composer 2 Fast (default)	$1.50	$7.50

Composer 1.5 figure from VentureBeat's launch coverage; Composer 2 from Cursor's changelog. · source

Language model rubric2026 criteria

Estimate from the version's published specs, benchmarks and reviews, 0-5; scores are only comparable within one criteria year. Launch 19 Mar 2026: CursorBench 61.3 (internal), Terminal-Bench 2.0 61.7 (Opus 4.6 58.0, GPT-5.4 75.1), SWE-bench Multilingual 73.7, per VentureBeat and Danilchenko relaying Cursor. Price Standard $0.50/$2.50, Fast (default) $1.50/$7.50 per M tokens (Cursor changelog). 200K context window per Cursor docs as reported by VentureBeat/Danilchenko. Speed figures are anecdotal only; reasoning and modalities not published. Two independent reviews opened; a third was not found.^[1]

Reviews

Cursor’s new coding model Composer 2 is here: It beats Claude Opus 4.6 but still trails GPT-5.4 · venturebeat.com · Mar 19, 2026The benchmark gains are substantial, even if GPT-5.4 still leads on one key chart
Cursor Composer 2 Review: Cheaper Than Opus, Built on Kimi K2.5 · danilchenko.dev · Apr 21, 2026It clears Opus 4.6 on Terminal-Bench 2.0 (61.7 vs 58.0) and trails GPT-5.4 (75.1) by a margin you can probably afford to give up.

Sentiment over timePositive

Sentiment

Sentiment over time
Cursor’s new coding model Composer 2 is here: It beats Claude Opus 4.6 but still trails GPT-5.4 · Mar 19, 2026	0.50
Cursor Composer 2 Review: Cheaper Than Opus, Built on Kimi K2.5 · Apr 21, 2026	0.50

References 482% CONFIDENCEOverall confidence: 82%How well the pin's source and references back up its dates.Weighted average of how firmly 4 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

[1]90%
cursor.com/changelog/composer-2
cursor.com· Posted Nov 9, 2026· Starts Mar 19, 2026 ✓· 39% of score
Cursor's changelog entry "Composer 2" is dated "Mar 19, 2026" and says "Composer 2 is now available in Cursor."
[2]80%
SpaceX has closed its $60bn Cursor deal - The Next Web
thenextweb.com· Published Aug 14, 2026· 28% of score
Confirms SpaceX completed its acquisition of Cursor's^[1] maker Anysphere on 14 August 2026, that Cursor keeps its name and that the legal entity remains Anysphere.
[3]75%
Cursor's Composer 2 Exposed as Kimi K2.5 Under the Hood - NYU Shanghai RITS
rits.shanghai.nyu.edu· Published Mar 23, 2026· 16% of score
Confirms the 19 March 2026 launch, the 61.7% Terminal-Bench 2.0 score against 58.0% for Claude Opus 4.6 and the Kimi K2.5 modified-MIT licence terms.^[1]
[4]75%
Cursor acknowledges Kimi K2.5 as Composer 2 base after developer spots model ID - Implicator.ai
implicator.ai· Published Mar 21, 2026· 16% of score
Reports that a developer found the Kimi model ID in Cursor's^[1] API within two hours of launch, and Cursor's statement about the 25%/75% compute split.

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AIPosted 11/09/202611/09/2026 at 12:41 am

To timeline

Cursor

Starts 03/19/2026CONFIRMED82% CONFIDENCE

Cursor's^[1] changelog entry "Composer 2" is dated "Mar 19, 2026" and says "Composer 2 is now available in Cursor."

Start: Mar 19, 202690% CONFIDENCEsource

Cursor Composer 2 Released

Name: Cursor Composer 2 Released
Author: Cursor

Cursor releases Composer 2, its in-house coding model, priced at $0.50/M input and $2.50/M output tokens, scoring 61.7 on Terminal-Bench 2.0 and later acknowledged to be built on Moonshot's Kimi K2.5.

Cursor released Composer 2 on 19 March 2026, describing frontier-level coding performance on challenging tasks^[1]
Standard pricing is $0.50 per million input and $2.50 per million output tokens; the Fast variant, made the default, costs $1.50 and $7.50^[1]
Cursor's blog reports CursorBench 61.3, Terminal-Bench 2.0 61.7 and SWE-bench Multilingual 73.7, up from Composer 1.5 at 44.2, 47.9 and 65.9, and credits its first continued-pretraining run plus long-horizon reinforcement learning on tasks needing hundreds of actions^[1]

The Kimi base question

Cursor did not name a base model at launch; a developer then found the ID kimi-k2p5-rl-0317-s515-fast in Cursor's API response less than two hours after the blog post^[4]
Lee Robinson said Composer 2 "started from an open-source base" with about 25% of final compute from the base and 75% from Cursor, and co-founder Aman Sanger called not naming it a miss; the split is Cursor's own claim^[4]
Kimi K2.5 is a trillion-parameter mixture-of-experts model under a modified MIT licence that requires products above $20 million monthly revenue or 100 million users to display "Kimi K2.5"; the interface showed only "Composer 2"^[3]; Moonshot later called it an authorized commercial partnership via Fireworks AI^[4]
Cursor's maker Anysphere was later acquired by SpaceX, with the deal closing on 14 August 2026^[2]

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Composer family pricing per million tokens

Language model rubric2026 criteria

Reviews

Sentiment over timePositive

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Cursor Composer 2 Released

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