Composer 2.5 vs Grok Build 0.1

Composer 2.5 and Grok Build 0.1 are both coding-focused models, but they are not interchangeable product surfaces. Composer 2.5 is Cursor's IDE-native model built for Cursor workflows, with CursorBench 3.1 evidence and standard/fast pricing tiers. Grok Build 0.1 is an xAI API model with a 256K context window, image input, structured outputs, JSON / Tool use, and public beta API availability. It is separate from today's Grok Build coding agent, which xAI says is powered by grok-4.6.

Pick Composer 2.5 if your team lives in Cursor and wants the strongest Cursor-native benchmark evidence at low standard token prices. Pick Grok Build 0.1 if you specifically need its standalone API model through xAI API, OpenRouter, or Vercel AI Gateway, or if a 256K xAI-hosted API route matters more than Cursor's IDE integration. Evaluate grok-4.6 instead when your target is the current Grok Build agent surface. Avoid claiming a clean benchmark winner across the pair: Composer's 63.2% is CursorBench 3.1, while Grok Build 0.1's checked primary sources emphasize API availability, context, pricing, and agentic coding fit rather than a directly comparable CursorBench row.

Decision scorecard

Local evidence first

Signal	Composer 2.5	Grok Build 0.1	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	256k	Higher is better when prompts, retrieval chunks, or transcripts are large.
Cheapest output	$2.50/1M tokens	$2/1M tokens	Cheapest tracked provider route; verify your exact region and tier.
Provider routes	1 tracked	3 tracked	Broader coverage can reduce vendor lock-in and fallback risk.
Shared benchmarks	0 shared	0 shared	No shared benchmark scores are available for this pair yet.

Decision tradeoffs

Choose Composer 2.5 when...

Composer 2.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
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 Grok Build 0.1 when...

Grok Build 0.1 has the lower cheapest tracked output price at $2/1M tokens.
Grok Build 0.1 has broader tracked provider coverage for fallback and route flexibility.
Grok Build 0.1 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
Local decision data tags Grok Build 0.1 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

Grok Build 0.1

$1,300

Cheapest tracked route/tier: xAI Console

Estimated monthly gap: $275. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Composer 2.5 -> Grok Build 0.1

No overlapping tracked provider route is sourced for Composer 2.5 and Grok Build 0.1; plan for SDK, billing, or endpoint changes.
Grok Build 0.1 is $0.50/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
Check replacement coverage for Code execution, IDE integration, and Parallel agents before moving production traffic.
Grok Build 0.1 adds Vision, Multimodal, and Reasoning in local capability data.

Grok Build 0.1 -> Composer 2.5

No overlapping tracked provider route is sourced for Grok Build 0.1 and Composer 2.5; plan for SDK, billing, or endpoint changes.
Composer 2.5 is $0.50/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
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)	Grok Build 0.1 xAI
Released	2026-05-18	2026-05-14
Context window	1m	256k
Parameters	—	—
Architecture	-	-
License	Proprietary	Proprietary
Openness	Proprietary	Proprietary
Weights	Not released	Not released
Code	Not released	Unknown
Commercial use	Commercial use: conditional	Commercial use: conditional
Knowledge cutoff	-	-

Pricing and availability

Pricing attribute	Composer 2.5	Grok Build 0.1
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.	0-200,001t $1/1M tokens 200,001t+ $2/1M 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.	0-200,001t $2/1M tokens 200,001t+ $4/1M tokens
Providers	Cursor	xAI Console Vercel AI Gateway OpenRouter

Capabilities

Capability	Composer 2.5	Grok Build 0.1
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

No shared benchmark scores are currently available for this pair.

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Model pages

Labs and families

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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.

Both models

Composer 2.5 Grok Build 0.1