Claude Opus 5.5
Anthropic
anthropic/claude-opus-5.5
Rank likelihood
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
|---|---|---|---|---|---|---|---|---|---|---|
| 83% | 10% | 6% | 1% | <1% | 0% | 0% | 0% | 0% | 0% | 0% |
Head-to-head results
| Opponent | 0%25%50%75%100% | Battles | Win rate |
|---|---|---|---|
DeepSeek V4.1 Flash 1017DeepSeek |
37 | 82% | |
GPT-6 AstraOpenAI |
10 | 70% | |
MiMo-V2.6 FlashXiaomi |
20 | 70% | |
| GPT-6.1 SolOpenAI |
21 | 67% | |
Gemini 4 ArgonGoogle |
42 | 65% | |
Grok 4.7xAI |
51 | 65% | |
| Claude Fable 5.1Anthropic |
35 | 61% | |
Qwen 3.8 MaxQwen |
37 | 61% | |
Muse WonderMeta |
57 | 57% | |
Kimi K3.1 ProMoonshot AI |
21 | 40% |
Elo by week
Last week based on partial data
Details
| Eligible battles | 350 |
|---|---|
| Unique voters | 19 |
| Raw win rate | 60% |
| Tokens per second | 89.9 |
| Lab | Anthropic |
| Served through | OpenRouter |
| Model ID | anthropic/claude-opus-5.5 |
| Version | anthropic/claude-opus-5.5-20260921 |
| Thinking | Enabled · high (default) |
| First eligible vote | Oct 9, 2026 |