Model comparison
Composer 2 vs Composer 2.5
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the Composer family.
Evidence parity. Composer 2 and Composer 2.5 share 3 comparable benchmark results. 1 of 8 categories are comparable. 2 results are unique to Composer 2; 2 to Composer 2.5.
Updated July 23, 2026- Shared results
- 3
- Composer 2 only
- 2
- Composer 2.5 only
- 2
- Comparable categories
- 1 / 8
Composer 2 makes more sense if you want this variant’s specific profile, while Composer 2.5 is the cleaner fit if agentic is the priority.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Composer 2 and Composer 2.5 sit in the same Composer family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.
Composer 2 and Composer 2.5 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
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 2.5 |
|---|---|---|---|
| Agentic | Composer 261.7 | Margin→ 7.6 | Composer 2.569.3 |
| Coding | Composer 258.0 | MarginNo overlap | Composer 2.5Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
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- Source ↗
Terminal-Bench 2.0
AgenticA 61.7%B 69.3%Winner: Composer 2.5Δ 7.6Terminal-Bench 2.0: Composer 2 scored 61.7%; Composer 2.5 scored 69.3%. Composer 2.5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Composer 2 | Composer 2.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2$0.5 input / $2.5 output | Composer 2.5$0.5 input / $2.5 output | Listed prices are equal. |
| Generation speedtokens per second | Composer 2Not available | Composer 2.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2Not available | Composer 2.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2200K | Composer 2.5200K | Listed context windows are equal. |
Benchmark Deep Dive
AgenticComposer 2.5 wins1 benchmarks
| Benchmark | Composer 2 | Composer 2.5 | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 61.7% | 69.3% | Composer 2.5 leads |
Coding6 benchmarks
| Benchmark | Composer 2 | Composer 2.5 | Result |
|---|---|---|---|
| SWE MultilingualSource | 73.7% | 79.8% | Composer 2.5 leads |
| SWE-RebenchSource | 58% | — | Not comparable |
| React Native EvalsSource | 96.1% | — | Not comparable |
| Terminal-Bench 2.0Source | 61.7% | 69.3% | Composer 2.5 leads |
| cursorBench31Source | — | 63.2% | Not comparable |
| cursorBench32Source | — | 56.1% | Not comparable |
Frequently Asked Questions (2)
Which is better, Composer 2 or Composer 2.5?
Composer 2 and Composer 2.5 are sibling variants in the Composer family, so the right pick depends on whether you value the better benchmark line, cheaper tokens, or the larger context window. They are tied on the BenchAlign leaderboard on the current data.
Which is better for agentic tasks, Composer 2 or Composer 2.5?
Composer 2.5 has the edge for agentic tasks in this comparison, averaging 69.3 versus 61.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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