GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
Model details →OpenAI: GPT-5.1 vs Anthropic Claude Haiku Latest
Anthropic Claude Haiku Latest wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Anthropic Claude Haiku family.
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.1 | Anthropic Claude Haiku Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 200K | 🏆 OpenAI: GPT-5.1 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.25 | $1.00 | 🏆 Anthropic Claude Haiku Latest |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $10.00 | $5.00 | 🏆 Anthropic Claude Haiku Latest |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.1 better than Anthropic Claude Haiku Latest?
Anthropic Claude Haiku Latest wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.1 and Anthropic Claude Haiku Latest?
Input: $1.25 vs $1.00 per 1M tokens. Output: $10.00 vs $5.00 per 1M tokens.
What context windows do OpenAI: GPT-5.1 and Anthropic Claude Haiku Latest support?
OpenAI: GPT-5.1 supports up to 400K tokens. Anthropic Claude Haiku Latest supports up to 200K tokens.
Do both OpenAI: GPT-5.1 and Anthropic Claude Haiku Latest support tool calling?
OpenAI: GPT-5.1: yes. Anthropic Claude Haiku Latest: yes.
Compare OpenAI: GPT-5.1 with other models
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