Composer 2.5 vs Grok 4.3
Composer 2.5 (2026) and Grok 4.3 (2026) compare an IDE-native agent built on Kimi K2.5 against a standalone API model. Composer 2.5 ships a 1m-token context window, while Grok 4.3 ships a 1m-token context window. On pricing, Composer 2.5 ranges from $0.50 to $3/1M input tokens by tier; Grok 4.3 ranges from $1.25 to $2.50/1M input tokens by tier. This page treats the result as workflow and deployment fit, not a universal model winner.
Use Composer 2.5 when you want the packaged IDE-native agent built on Kimi K2.5 workflow; use Grok 4.3 when you need a model you can route, wrap, or run outside that product surface.
Decision scorecard
Local evidence first| Signal | Composer 2.5 | Grok 4.3 |
|---|---|---|
| Product type | IDE-native agent built on Kimi K2.5 | Standalone API model |
| Best for | Long Cursor IDE sessions and autonomous in-IDE coding | API builders, multimodal apps, and non-IDE automation |
| Decision fit | Coding, RAG, and Agents | RAG, Agents, and Long context |
| Context window | 1m | 1m |
| Cheapest output | $2.50/1M tokens | $2.50/1M tokens |
| Provider routes | 1 tracked | 5 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- 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.
- Grok 4.3 has broader tracked provider coverage for fallback and route flexibility.
- Grok 4.3 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Grok 4.3 for RAG, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Composer 2.5
$1,025
Cheapest tracked route/tier: Cursor Standard async
Grok 4.3
$1,625
Cheapest tracked route/tier: xAI Console
Estimated monthly gap: $600. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Composer 2.5 and Grok 4.3; plan for SDK, billing, or endpoint changes.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- Check replacement coverage for Code execution, IDE integration, and Parallel agents before moving production traffic.
- Grok 4.3 adds Vision, Multimodal, and Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Grok 4.3 and Composer 2.5; plan for SDK, billing, or endpoint changes.
- Cheapest tracked output pricing is tied, so migration risk shifts to quality, latency, and provider packaging.
- 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 | ||
|---|---|---|
| Released | 2026-05-18 | 2026-05-06 |
| Context window | 1m | 1m |
| Parameters | — | ~0.5T |
| 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 | - | 2024-11 |
Pricing and availability
| Pricing attribute | Composer 2.5 | Grok 4.3 |
|---|---|---|
| Input price |
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| Output price |
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| Providers |
Capabilities
| Capability | Composer 2.5 | Grok 4.3 |
|---|---|---|
| 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.
Continue comparing
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Last reviewed: 2026-07-10. Data sourced from public model cards and provider documentation.