GPT-6 Astra vs Kimi K2.6
GPT-6 Astra 
Kimi K2.6 Verdict
- GPT-6 Astra (max) leads on quality: 70.9 vs 60.7.
- GPT-6 Astra (max) is stronger in agents & tools, coding, composite, knowledge, maths, reasoning.
- Kimi K2.6 is stronger in human preference, instruction following, long context, multimodal.
- Kimi K2.6 is 12× cheaper ($1.71 vs $20.00 per 1M blended).
- Kimi K2.6 streams 1.6× faster (44 vs 27 tokens per second).
| Metric | GPT-6 Astra (max) | Kimi K2.6 |
|---|---|---|
| BenchLeader Index | 70.9 | 60.7 |
| Agents & tools score | 68.2 | 45.1 |
| Coding score | 78.6 | 60.4 |
| Composite score | 72.9 | 68.6 |
| Knowledge score | 80.0 | 58.6 |
| Maths score | 77.2 | 53.8 |
| Reasoning score | 73.6 | 66.0 |
| Human preference score | – | 60.8 |
| Instruction following score | – | 73.7 |
| Long context score | – | 67.1 |
| Multimodal score | – | 63.7 |
| Blended price $/M | $20.00 | $1.71 |
| Output speed | 27 tok/s | 44 tok/s |
| Time to first answer | 337.3 s | 103.2 s |
| Context window | 1.1M | 262k |
| GPQA Diamond | 95.8% | 90.8% |
| FrontierMath Tiers 1–3 | 93.7% | 57.2% |
| FrontierMath Tier 4 | 97.6% | 25.6% |
| OTIS Mock AIME | 100.0% | 96.1% |
| SWE-bench Verified (Epoch) | – | 76.7% |
| SimpleQA Verified | 75.6% | 34.9% |
| Terminal-Bench | 58.2% | – |
| OSWorld-Verified 2.0 | – | 4.6% |
| SciCode | 56.5% | 53.5% |
| WeirdML | – | 55.9% |
| APEX-Agents | – | 18.9% |
| FrontierCode | 53.3% | – |
| ProofBench | – | 16.0% |
| Epoch Capabilities Index | – | 151.0 |
| LMArena Text | – | 1461 |
| LMArena Hard Prompts | – | 1485 |
| LMArena Coding | – | 1514 |
| LMArena WebDev | 1796 | 1509 |
| LMArena Vision | – | 1281 |
| LMArena Agent | 12.5 | – |
| LiveBench | 82.2% | – |
| LiveBench Reasoning | 92.7% | – |
| LiveBench Coding | 80.4% | – |
| LiveBench Agentic Coding | 57.3% | – |
| LiveBench Mathematics | 96.8% | – |
| LiveBench Data Analysis | 83.0% | – |
| LiveBench Language | 89.4% | – |
| AA Intelligence Index | – | 31.3 |
| IFBench | – | 76.0% |
| AA-LCR | – | 81.0% |
| MMMU-Pro | – | 79.4% |
| AA-Omniscience | – | 5.3 |
| Terminal-Bench Hard | – | 43.9% |
| GPQA Diamond (AA) | – | 91.1% |
| Humanity's Last Exam (AA) | – | 37.5% |
| SciCode (AA) | – | 51.5% |
| τ²-Bench Telecom (AA) | – | 95.9% |
| LiveCodeBench | – | 86.8% |
| MMLU-Pro | – | 87.6% |
| LegalBench | – | 84.7% |
| CorpFin | – | 66.7% |
| TaxEval | – | 74.7% |
| Terminal-Bench 2.1 (Vals) | 87.3% | 53.6% |
| SWE-bench (Vals) | – | 76.2% |
| GPQA Diamond (Vals) | – | 89.1% |
| Vals Index | 66.6 | 43.5 |
| HiL-Bench | – | 18.7% |
| EQ-Bench 4 | – | 1202 |
| ARC-AGI-1 | 97.5% | – |
| ARC-AGI-2 | 95.0% | – |
| ARC-AGI-3 | 98.6% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-6 Astra vs Kimi K2.6: questions
- Is GPT-6 Astra better than Kimi K2.6?
- GPT-6 Astra (max) leads on quality: 70.9 vs 60.7. The BenchLeader Index combines every independent quality benchmark; GPT-6 Astra (max) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GPT-6 Astra better than Kimi K2.6 for coding?
- GPT-6 Astra scores higher in coding (79 vs 60 on the category index, where 50 is average).
- Is GPT-6 Astra better than Kimi K2.6 for agentic tasks?
- GPT-6 Astra scores higher in agentic tasks (68 vs 45 on the category index, where 50 is average).
- Which is cheaper, GPT-6 Astra or Kimi K2.6?
- Kimi K2.6 is cheaper: $1.71 against $20.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-6 Astra or Kimi K2.6?
- Kimi K2.6 streams faster: 44 against 27 output tokens per second.
- Which has the larger context window?
- GPT-6 Astra accepts more context: 1.1M against 262k tokens.