Claude Haiku 4.5 vs GPT-5.1
Claude Haiku 4.5 costs 2.0x less per output token.
Which Is Cheaper?
At 1M tokens/mo
Claude Haiku 4.5: $3
GPT-5.1: $6
At 10M tokens/mo
Claude Haiku 4.5: $30
GPT-5.1: $56
At 100M tokens/mo
Claude Haiku 4.5: $300
GPT-5.1: $563
Which Performs Better?
| Test | Claude Haiku 4.5 | GPT-5.1 |
|---|---|---|
| Structured Output | — | — |
| Strategic Analysis | — | — |
| Constrained Rewriting | — | — |
| Creative Problem Solving | — | — |
| Tool Calling | — | — |
| Faithfulness | — | — |
| Classification | — | — |
| Long Context | — | — |
| Safety Calibration | — | — |
| Persona Consistency | — | — |
| Agentic Planning | — | — |
| Multilingual | — | — |