Claude Haiku 5.5
AnthropicReleased Oct 7, 2026
Claude Haiku 5.5 is not ranked on LMArena yet; output price $0.50 per 1M tokens.
Key metrics
Reasoning effort comparison
Artificial Analysis measurements per reasoning effort of the same model| Effort | Intelligence | Coding | tok/s | TTFT (s) | First answer (s) |
|---|---|---|---|---|---|
| maxUsed in table | 43.4 | – | 235 | 273 | 273 |
| xhigh | 41.2 | – | 173 | 45 | 45 |
| high | 37.8 | – | 145 | 15 | 15 |
| medium | 34.5 | – | 151 | 9.4 | 9.4 |
| low | 29.5 | – | 139 | 4.8 | 4.8 |
More from Anthropic
| # | Model | Arena | Intel. | Output $ | tok/s |
|---|---|---|---|---|---|
| 2 | Claude Opus 5.5 | 1514.8 | 57.6 | $20.00 | 98 |
| 3 | Claude Fable 5.1 | 1510.0 | 53.4 | $50.00 | 72 |
| 4 | Claude Opus 5 | 1507.0 | 50.8 | $25.00 | – |
| 5 | Claude Opus 4.6 | 1502.9 | 31.9 | $25.00 | – |
| 8 | Claude Fable 5 | 1491.2 | 49.6 | $50.00 | – |
| 9 | Claude Opus 4.7 | 1489.6 | 40.7 | $25.00 | – |
Pricing
- Official API list price: $0.10 input and $0.50 output per 1M tokens (USD).
- At a typical 3:1 input-to-output ratio, the blended cost is about $0.20 per 1M tokens.
- Among 78 models with an output price, it is the #5 cheapest.
- The cheapest OpenRouter route charges $0.10 input / $0.50 output.
Sources & methodology
Claude Haiku 5.5 (Anthropic): Intelligence Index 43.4, $0.10 in / $0.50 out per 1M tokens, 1M context. Data updated Oct 9, 2026.
- LMArena — Arena score, 95% confidence interval, votes and rank.
- Artificial Analysis — Intelligence / Coding Index, output speed and latency (medians).
- OpenRouter — Route prices, context length and listing date.
Arena scores use the Bradley-Terry model (not Elo); ± is the half-width of the 95% confidence interval. Latency figures are Artificial Analysis medians; for reasoning models, time to first token and to first answer include the thinking phase. Data syncs daily at 14:20 (UTC+8).
FAQ
What rank is Claude Haiku 5.5 right now?
Claude Haiku 5.5 has not been scored by LMArena yet, so it is not ranked here.
What does Claude Haiku 5.5 cost via API?
Input $0.10 / output $0.50 per 1M tokens (official API list price; the OpenRouter quote when no official price is available). At a typical 3:1 input-to-output ratio, the blended cost is about $0.20 per 1M tokens.
How fast is Claude Haiku 5.5?
Artificial Analysis measures about 235 output tokens per second, 273 s to the first token and 273 s to the first answer token; it is a reasoning model, so latency includes thinking time.
Is Claude Haiku 5.5 open source? Can it be self-hosted?
Claude Haiku 5.5 is a closed model, available only via official APIs or hosted services.
What is the context length of Claude Haiku 5.5?
1M (1,000,000 tokens, as listed on OpenRouter).