Comparing 2 models
Kimi K3 vs GPT-6.1 Sol
Benchmarks through
Verdict
GPT-6.1 Sol places higher on 6 of the 7 tasks where both are ranked. Kimi K3 costs 6.6x less per input token. GPT-6.1 Sol accepts 1.0x more context. Only Kimi K3 has open weights for self-hosting.
- Choose Kimi K3 for Code Completion (#5), you need to self-host.
- Choose GPT-6.1 Sol for JSON & Schema Output (#2), Structured Data Extraction (#2), Autonomous Agents (#4).
Built from the published task rankings below; ranks come from each task's own weighted benchmarks, so a win on one task says nothing about another.
Measured head to head
Benchmarks both models were run on
| Evaluation | Kimi K3 | GPT-6.1 Sol | Source |
|---|---|---|---|
| Design Arena Coding | 1363 Elo | 1346 Elo | source · 2026-10-16 |
| Design Arena UI | 1346 Elo | 1331 Elo | source · 2026-10-16 |
| Design Arena Website | 1337 Elo | 1323 Elo | source · 2026-10-16 |
| FrontierMath Tiers 1-3 (Epoch AI) | 72.2% ± 2.7 | 93.7% ± 1.4 | source · 2026-07-17 |
| GPQA Diamond (Epoch AI) | 91.9% ± 1.9 | 95.4% ± 1.4 | source · 2026-08-07 |
| GPQA Diamond (Epoch AI) | 93.1% ± 1.5 | 95.4% ± 1.4 | source · 2026-07-16 |
| LiveBench Agentic Coding | 62.2% | 54.5% | source · 2026-10-16 |
| LiveBench Coding | 81.5% | 80.4% | source · 2026-10-16 |
| LiveBench Data Analysis | 78.7% | 82.7% | source · 2026-10-16 |
| LiveBench Instruction Following | 71.4% | 74.2% | source · 2026-10-16 |
| LiveBench Language | 85.5% | 90.1% | source · 2026-10-16 |
| LiveBench Math | 84.4% | 96.8% | source · 2026-10-16 |
| LiveBench Reasoning | 90.7% | 92.6% | source · 2026-10-16 |
| LMArena Agent | 1.9 | 14.8 | source · 2026-10-14 |
| LMArena Agent Bash Recovery | 4.4 | 4.5 | source · 2026-10-08 |
| LMArena Agent Steerability | 0.5 | 14.7 | source · 2026-10-14 |
| LMArena Agent Task Outcome | 6.3 | 15.7 | source · 2026-10-14 |
| LMArena Agent Tool Hallucination | 0.6 | 0.6 | source · 2026-10-14 |
| LMArena Creative Writing | 1456 Elo | 1430 Elo | source · 2026-10-15 |
| LMArena Instruction Following | 1483 Elo | 1469 Elo | source · 2026-10-15 |
| LMArena Long Query | 1493 Elo | 1464 Elo | source · 2026-10-15 |
| LMArena Math | 1494 Elo | 1470 Elo | source · 2026-10-15 |
| LMArena Text | 1487 Elo | 1484 Elo | source · 2026-10-15 |
| LMArena Text Factuality | 1471 Elo | 1465 Elo | source · 2026-10-15 |
| LMArena WebDev | 1655 Elo | 1760 Elo | source · 2026-10-13 |
| LMArena WebDev Image-to-Web | 1579 Elo | 1703 Elo | source · 2026-10-09 |
| OTIS Mock AIME (Epoch AI) | 93.3% ± 3.8 | 100% ± 0 | source · 2026-08-07 |
| OTIS Mock AIME (Epoch AI) | 97.2% ± 1.1 | 100% ± 0 | source · 2026-07-16 |
| SimpleQA Verified (Epoch AI) | 50.6% ± 1.6 | 73.9% ± 1.4 | source · 2026-08-27 |
Values are as published by each evaluator, in its own units; rows from different evaluators are not on a common scale.
task evidence
How they place when the question changes
Lower ranks are better. “Best” marks the strongest option in this shortlist for that task.