Model comparison
Composer 2 Fast vs DeepSeek V4 Flash
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Composer 2 Fast unranked (Not scored); DeepSeek V4 Flash #68 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Composer 2 Fast and DeepSeek V4 Flash share 0 comparable benchmark results. 0 of 8 categories are comparable. 1 result is unique to Composer 2 Fast; 23 to DeepSeek V4 Flash.
Updated July 28, 2026- Shared results
- 0
- Composer 2 Fast only
- 1
- DeepSeek V4 Flash only
- 23
- Comparable categories
- 0 / 8
Benchmark data for Composer 2 Fast and DeepSeek V4 Flash is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 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.
DeepSeek V4 Flash has the larger context window at 1M, compared with 200K for Composer 2 Fast.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Composer 2 Fast | DeepSeek V4 Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Composer 2 FastNot available | DeepSeek V4 Flash$0.14 input / $0.28 output | A complete price comparison is not available. |
| Generation speedtokens per second | Composer 2 FastNot available | DeepSeek V4 FlashNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Composer 2 FastNot available | DeepSeek V4 FlashNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Composer 2 Fast200K | DeepSeek V4 Flash1M | DeepSeek V4 Flash lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding6 benchmarks
| Benchmark | Composer 2 Fast | DeepSeek V4 Flash | Result |
|---|---|---|---|
| React Native EvalsSource | 94.9% | — | Not comparable |
| LiveCodeBench Pass@1-COTSource | — | 55.2% | Not comparable |
| SWE-bench VerifiedSource | — | 73.7% | Not comparable |
| SWE-bench ProSource | — | 49.1% | Not comparable |
| SWE MultilingualSource | — | 69.7% | Not comparable |
| Terminal-Bench 2.0Source | — | 49.1% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
Math4 benchmarks
Multimodal1 benchmarks
| Benchmark | Composer 2 Fast | DeepSeek V4 Flash | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1233 | Not comparable |
Frequently Asked Questions (3)
Can I compare Composer 2 Fast and DeepSeek V4 Flash 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 Fast and DeepSeek V4 Flash today?
DeepSeek V4 Flash: $0.14 input / $0.28 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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