o3 vs Claude Haiku 4.5
API pricing, benchmark indices and specs — updated 19 October 2026.
anthropic · B · API-only
Input / 1M
$1.00
Output / 1M
$5.00
AA index
16.9
proprietary · 200K context
Specification comparison
Differences are highlighted; identical values are muted.
| Specification | o3 | Claude Haiku 4.5 |
|---|---|---|
| Deployment | API-only (closed weights) | API-only (closed weights) |
| Parameters | n/a — API-only | n/a — API-only |
| Architecture | n/a — API-only | n/a — API-only |
| Context length | 200,000 | 200,000 |
| Licence | Proprietary | Proprietary |
| Commercial use | Per API terms | Per API terms |
| Languages | n/a — API-only | n/a — API-only |
| Downloads 30d | n/a — API-only | n/a — API-only |
| Downloads all time | n/a — API-only | n/a — API-only |
| Quantizations on the Hub | n/a — API-only | n/a — API-only |
| Gated | n/a — API-only | n/a — API-only |
| First seen on the Hub | n/a — API-only | n/a — API-only |
| API input price / 1M tokens | $2.00 | $1.00 |
| API output price / 1M tokens | $8.00 | $5.00 |
| Est. cost per 1M input + 1M output tokens | $10.00 | $6.00 |
| Cached input / 1M tokens | $0.50 | $0.10 |
| AA Intelligence Index | 20.2 | 16.9 |
| AA Coding Index | — | 43.9 |
| AA Agentic Index | — | 8 |
| Max output tokens | 100,000 | 64,000 |
| API providers | 1 | 4 |
| Tool calling | Yes | Yes |
| Reasoning mode | Yes | Yes |
API cost
Estimated cost of 1M input + 1M output tokens via OpenRouter
o3
$10.00
Claude Haiku 4.5
$6.00
Claude Haiku 4.5 is 1.7× cheaper at list price.