A
Claude Opus 4.5
Anthropic
This model has not been scored by LMArena yet, so it is not ranked here; pricing and context length sync daily.
- Organization
- Anthropic
- Arena score
- —
- LMArena rank
- —
- Input price ($/1M tokens)
- $5.00
- Output price ($/1M tokens)
- $25.00
- Context length
- 200K
- Listed
- 2025-11-24
- License
- —
- Open weights
- —
- Intelligence index（max）
- 23.7
- Coding index
- —
- Output speed (tokens/s)
- —
- Time to first token (s)
- —
Reasoning effort comparison Artificial Analysis measurements per reasoning effort of the same model
| Effort | Intelligence index | Coding index | Output speed (tokens/s) | Time to first token (s) |
|---|---|---|---|---|
| thinking | 29.1 | — | — | — |
| max Used in table | 23.7 | — | — | — |
FAQ
What rank is Claude Opus 4.5 right now?
Claude Opus 4.5 has not been scored by LMArena yet, so it is not ranked here.
What does Claude Opus 4.5 cost via API?
Input $5 / output $25 per 1M tokens (OpenRouter quotes; may change with official pricing).
Is Claude Opus 4.5 open source? Can it be self-hosted?
Claude Opus 4.5 is a closed model, available only via official APIs or hosted services.