Model comparison
Composer 2.5 vs Gemini 3.5 Flash-Lite
Head-to-head evidence from 2 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Composer 2.5 and Gemini 3.5 Flash-Lite share 2 comparable benchmark results. 1 of 8 categories are comparable. 3 results are unique to Composer 2.5; 19 to Gemini 3.5 Flash-Lite.
Updated July 21, 2026- Shared results
- 2
- Composer 2.5 only
- 3
- Gemini 3.5 Flash-Lite only
- 19
- Comparable categories
- 1 / 8
Treat this as a split decision. Composer 2.5 makes more sense if agentic is the priority; Gemini 3.5 Flash-Lite is the better fit if you need the larger 1M context window.
Confidence note. This is a partial-evidence comparison with 2 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 2.5 and Gemini 3.5 Flash-Lite 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.
Gemini 3.5 Flash-Lite gives you the larger context window at 1M, compared with 200K for Composer 2.5.
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 2.5 | Δ | Gemini 3.5 Flash-Lite |
|---|---|---|---|
| Agentic | Composer 2.569.3 | Margin← 5.9 | Gemini 3.5 Flash-Lite63.4 |
| Coding | Composer 2.5Not measured | MarginNo overlap | Gemini 3.5 Flash-Lite54.2 |
| Reasoning | Composer 2.5Not measured | MarginNo overlap | Gemini 3.5 Flash-Lite72.2 |
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 69.3%B 54%Winner: Composer 2.5Δ 15.3Terminal-Bench 2.0: Composer 2.5 scored 69.3%; Gemini 3.5 Flash-Lite scored 54%. 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 2.5 | Gemini 3.5 Flash-Lite | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2.5$0.5 input / $2.5 output | Gemini 3.5 Flash-Lite$0.3 input / $2.5 output | Gemini 3.5 Flash-Lite has the lower combined listed price. |
| Generation speedtokens per second | Composer 2.5Not available | Gemini 3.5 Flash-LiteNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2.5Not available | Gemini 3.5 Flash-LiteNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2.5200K | Gemini 3.5 Flash-Lite1M | Gemini 3.5 Flash-Lite lists the larger context window. |
Benchmark Deep Dive
AgenticComposer 2.5 wins7 benchmarks
| Benchmark | Composer 2.5 | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 69.3% | 54% | Composer 2.5 leads |
| OSWorld-VerifiedSource | — | 74% | Not comparable |
| GDPval-AASource | — | 1140 | Not comparable |
| AA Agentic IndexSource | — | 26.8% | Not comparable |
| GDPval-AASource | — | 32.0% | Not comparable |
| AA BriefcaseSource | — | 634 | Not comparable |
| AA Tau3 BankingSource | — | 16.5% | Not comparable |
Coding7 benchmarks
| Benchmark | Composer 2.5 | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 69.3% | 54.0% | Composer 2.5 leads |
| SWE MultilingualSource | 79.8% | — | Not comparable |
| cursorBench31Source | 63.2% | — | Not comparable |
| cursorBench32Source | 56.1% | — | Not comparable |
| SWE-bench ProSource | — | 54.2% | Not comparable |
| AA Coding IndexSource | — | 49.3% | Not comparable |
| AA-SciCodeSource | — | 40.9% | Not comparable |
Reasoning3 benchmarks
Knowledge6 benchmarks
| Benchmark | Composer 2.5 | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 36.5% | Not comparable |
| AA-GPQA DiamondSource | — | 83.8% | Not comparable |
| AA-HLESource | — | 17.5% | Not comparable |
| AA-Omniscience IndexSource | — | 6.9% | Not comparable |
| AA-Omniscience AccuracySource | — | 30.3% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 33.5% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Composer 2.5 | Gemini 3.5 Flash-Lite | Result |
|---|---|---|---|
| AA-MMMU-ProSource | — | 79.0% | Not comparable |
Frequently Asked Questions (2)
Which is better, Composer 2.5 or Gemini 3.5 Flash-Lite?
Composer 2.5 and Gemini 3.5 Flash-Lite are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for agentic tasks, Composer 2.5 or Gemini 3.5 Flash-Lite?
Composer 2.5 has the edge for agentic tasks in this comparison, averaging 69.3 versus 63.4. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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