Composer 2.5 vs Kimi K2.6

Composer 2.5 and Kimi K2.6 are closely related but not equivalent. Cursor says Composer 2.5 is built on Moonshot's Kimi K2.5 checkpoint; Kimi K2.6 is the successor generation with open-weight/API availability, multimodal input, and broader benchmark coverage.

Pick Composer 2.5 for Cursor-native IDE work and Cursor's agent harness. Pick Kimi K2.6 for API access, open-weight/self-hosting evaluation, multimodal workflows, and broader standalone benchmark coverage. The key caveat is lineage: Composer 2.5 is a Cursor fine-tune of Kimi K2.5, while K2.6 is the next Kimi generation, not Composer's base model.

Decision scorecard

Local evidence first

Signal	Composer 2.5	Kimi K2.6	How to read it
Product type	IDE-native agent built on Kimi K2.5	Coding-specialized model	Read downstream rows through the product-type lens before comparing benchmarks, prices, or provider availability.
Best for	Long Cursor IDE sessions and autonomous in-IDE coding	custom coding agents, code generation, and tool loops	Use-case synthesis from product type, capability flags, context, and provider data.
Decision fit	Coding, RAG, and Agents	Coding, RAG, and Agents	Primary workload tags from local decision data.
Context window	1m	262k	Higher is better when prompts, retrieval chunks, or transcripts are large.
Cheapest output	$2.50/1M tokens	$3.49/1M tokens	Cheapest tracked provider route; verify your exact region and tier.
Provider routes	1 tracked	9 tracked	Broader coverage can reduce vendor lock-in and fallback risk.
Shared benchmarks	5 shared	CursorBench leader	Visible benchmark lead is 19.9 points on CursorBench.

Decision tradeoffs

Choose Composer 2.5 when...

Composer 2.5 holds a shared-benchmark lead on CursorBench, ahead by 15.6 points.
Composer 2.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
Composer 2.5 has the lower cheapest tracked output price at $2.50/1M tokens.
Composer 2.5 uniquely exposes Code execution, IDE integration, and Parallel agents in local model data.
Local decision data tags Composer 2.5 for Coding, RAG, and Agents.

Choose Kimi K2.6 when...

Kimi K2.6 holds a shared-benchmark lead on CursorBench, ahead by 19.9 points.
Kimi K2.6 has broader tracked provider coverage for fallback and route flexibility.
Kimi K2.6 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
Local decision data tags Kimi K2.6 for Coding, RAG, and Agents.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Composer 2.5

Requests / monthInput tokens / requestOutput tokens / request

Composer 2.5

$1,025

Cheapest tracked route/tier: Cursor Standard async

Kimi K2.6

$1,457

Cheapest tracked route/tier: OpenRouter

Estimated monthly gap: $432. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Composer 2.5 -> Kimi K2.6

No overlapping tracked provider route is sourced for Composer 2.5 and Kimi K2.6; plan for SDK, billing, or endpoint changes.
Kimi K2.6 is $0.99/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
Check replacement coverage for Code execution, IDE integration, and Parallel agents before moving production traffic.
Kimi K2.6 adds Vision, Multimodal, and Reasoning in local capability data.

Kimi K2.6 -> Composer 2.5

No overlapping tracked provider route is sourced for Kimi K2.6 and Composer 2.5; plan for SDK, billing, or endpoint changes.
Composer 2.5 is $0.99/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Composer 2.5 adds Code execution, IDE integration, and Parallel agents in local capability data.

Specs

Specification	Composer 2.5 Cursor (Anysphere)	Kimi K2.6 Moonshot AI
Released	2026-05-18	2026-04-20
Context window	1m	262k
Parameters	—	1T
Architecture	-	Mixture of Experts
License	Proprietary	MITOSI-approved
Openness	Proprietary	Open source
Weights	Not released	Available·Moonshot Modified MIT License
Code	Not released	Available·Moonshot Modified MIT License
Commercial use	Commercial use: conditional	Commercial use: permitted
Knowledge cutoff	-	2025-04

Pricing and availability

Pricing attribute	Composer 2.5	Kimi K2.6
Input price	Standard async $0.50/1M tokens Cursor Composer 2.5 standard tier. Fast interactive $3/1M tokens Cursor says fast has the same intelligence and is the default.	$0.73/1M tokens
Output price	Standard async $2.50/1M tokens Cursor Composer 2.5 standard tier. Fast interactive $15/1M tokens Cursor says fast has the same intelligence and is the default.	$3.49/1M tokens
Providers	Cursor	Cloudflare Workers AI NVIDIA NIM Moonshot AI Kimi Fireworks AI OpenRouter Microsoft Foundry

Capabilities

Capability	Composer 2.5	Kimi K2.6
Vision	No	Yes
Multimodal	No	Yes
Reasoning	No	Yes
JSON / Tool use	Yes	Yes
Structured outputs	No	Yes
Code execution	Yes	No
IDE integration	Yes	No
Computer use	No	No
Parallel agents	Yes	No

Benchmarks

Benchmark	Composer 2.5	Kimi K2.6
CursorBench	27.7	47.6
CursorBench	63.2	47.6
CursorBench	56.1	47.6
SWE-bench Multilingual	79.8	76.7
Terminal-Bench 2.0	69.3	66.7

Harness caveat. Composer 2.5 is measured as IDE-native agent built on Kimi K2.5, while Kimi K2.6 is coding-specialized model. Treat shared benchmark scores as directional because IDE or product scaffolding, tool access, prompt routing, and interaction mode can change real application results.

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Last reviewed: 2026-06-30. Data sourced from public model cards and provider documentation.

Both models

Composer 2.5 Kimi K2.6