Model comparison
Composer 2 vs Composer 2 Fast
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the Composer family.
Evidence parity. Composer 2 and Composer 2 Fast share 1 comparable benchmark result. 0 of 8 categories are comparable. 4 results are unique to Composer 2; 0 to Composer 2 Fast.
Updated July 23, 2026- Shared results
- 1
- Composer 2 only
- 4
- Composer 2 Fast only
- 0
- Comparable categories
- 0 / 8
Benchmark data for Composer 2 and Composer 2 Fast is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Composer 2 | Δ | Composer 2 Fast |
|---|---|---|---|
| Agentic | Composer 261.7 | MarginNo overlap | Composer 2 FastNot measured |
| Coding | Composer 258.0 | MarginNo overlap | Composer 2 FastNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Composer 2 | Composer 2 Fast | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2$0.5 input / $2.5 output | Composer 2 FastNot available | A complete price comparison is not available. |
| Generation speedtokens per second | Composer 2Not available | Composer 2 FastNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2Not available | Composer 2 FastNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2200K | Composer 2 Fast200K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Composer 2 | Composer 2 Fast | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 61.7% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Composer 2 and Composer 2 Fast on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Composer 2 and Composer 2 Fast today?
Composer 2: $0.50 input / $2.50 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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