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Gemini 4 Argon1526Claude Opus 5.51516Claude Fable 5.11513Claude Opus 51508Claude Opus 4.61502▲4Muse Wonder1501Gemini 3.8 Flash1498MiMo-V2.6-Pro1491Muse Spark 1.31491Claude Fable 51491▼2Claude Opus 4.71490▲6Gemini 3.7 Flash1490Qwen3.8-Max1484▲3Gemini 3.5 Flash1482▼1Muse Spark 1.21482▼8Gemini 3.1 Pro Preview1480▲0Gemini 3.6 Flash1480▲0Gemini 3 Pro1480Muse Spark 1.11478▼2Qwen3.7-Max-Preview1475▲1Kimi K31475▲2Muse Spark1474▲1GLM-5.31474Claude Sonnet 5.51473GLM-5.3-Flash1472▲1GPT-5.51472▲6Qwen3.5-Max-Preview1470▼1GLM-5.21470▲6GPT-5.41469▲17ERNIE 5.11468▼0Gemini 3 Flash1466▼1DeepSeek-V4.1-Flash-202609101464Gemini 4 Argon1526Claude Opus 5.51516Claude Fable 5.11513Claude Opus 51508Claude Opus 4.61502▲4Muse Wonder1501Gemini 3.8 Flash1498MiMo-V2.6-Pro1491Muse Spark 1.31491Claude Fable 51491▼2Claude Opus 4.71490▲6Gemini 3.7 Flash1490Qwen3.8-Max1484▲3Gemini 3.5 Flash1482▼1Muse Spark 1.21482▼8Gemini 3.1 Pro Preview1480▲0Gemini 3.6 Flash1480▲0Gemini 3 Pro1480Muse Spark 1.11478▼2Qwen3.7-Max-Preview1475▲1Kimi K31475▲2Muse Spark1474▲1GLM-5.31474Claude Sonnet 5.51473GLM-5.3-Flash1472▲1GPT-5.51472▲6Qwen3.5-Max-Preview1470▼1GLM-5.21470▲6GPT-5.41469▲17ERNIE 5.11468▼0Gemini 3 Flash1466▼1DeepSeek-V4.1-Flash-202609101464
MiMo-V2.5-Pro1464▼1GLM-5.11463▲0Claude Opus 4.81461▲8Claude Sonnet 4.61458▼1Gemini 2.5 Pro1458GPT-5.6 Sol1457Kimi K2.61455▲0Qwen3.7-Plus1455▲0MiMo-V2.6-Flash1452DeepSeek-V4-Pro1451▲1Claude Opus 4.51451▲0Grok 4.20 Beta1451Grok 4.20 Multi-Agent Beta1451▲1amazon-nova-experimental-chat1449Dola Seed 2.0 Pro1448▲1GPT-5.6 Terra1448Grok 4.51448▼2Qwen3.6-Max-Preview1447▲1GLM-51446▼0Kimi K2.51445NVIDIA-Nemotron-3-Ultra-550B-A55B1445ERNIE 5.01445▲0Grok 4.20 Beta 11445▲0GPT-6.1 Sol1444Gemma 4 31B1443▲1GPT-5.11443▲20Claude Sonnet 51442GPT-6 Astra1442IInkling1442▲2Step 5 Preview1442GLM-4.61440▼0Qwen3.8-27B1440▲1MiMo-V2.5-Pro1464▼1GLM-5.11463▲0Claude Opus 4.81461▲8Claude Sonnet 4.61458▼1Gemini 2.5 Pro1458GPT-5.6 Sol1457Kimi K2.61455▲0Qwen3.7-Plus1455▲0MiMo-V2.6-Flash1452DeepSeek-V4-Pro1451▲1Claude Opus 4.51451▲0Grok 4.20 Beta1451Grok 4.20 Multi-Agent Beta1451▲1amazon-nova-experimental-chat1449Dola Seed 2.0 Pro1448▲1GPT-5.6 Terra1448Grok 4.51448▼2Qwen3.6-Max-Preview1447▲1GLM-51446▼0Kimi K2.51445NVIDIA-Nemotron-3-Ultra-550B-A55B1445ERNIE 5.01445▲0Grok 4.20 Beta 11445▲0GPT-6.1 Sol1444Gemma 4 31B1443▲1GPT-5.11443▲20Claude Sonnet 51442GPT-6 Astra1442IInkling1442▲2Step 5 Preview1442GLM-4.61440▼0Qwen3.8-27B1440▲1

Independent

Composer 2.5

Composer 2.5 is a proprietary model. Its best result is #24 of 85 on SWE-bench with 79.60%.

Developer
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Released
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Context window
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Price in / out, per 1M tokens
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Weights
Proprietary
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Reasoning
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Tool use
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Benchmarks

BenchmarkScore barAccuracyRankCost / test
SWE-benchCoding79.60%24 / 85N/A
Vibe Code BenchCoding49.61%59 / 115$0.50

Vals AI, as of Oct 24, 2026.

Compare Composer 2.5

Questions

Is Composer 2.5 open source?

No. Composer 2.5 is proprietary and served through its provider’s API.

Sources

Every number on this page comes from these sources; models without a published number show none. Download the data. Cite as “Nexus Explorer, nexus.inc/models”.