OpenAI o3-mini is a cost-efficient language model optimized for STEM reasoning tasks, particularly excelling in science, mathematics, and coding. This model supports the `reasoning_effort` parameter, which can be set to...
Model details →OpenAI: o3 Mini vs Anthropic: Claude Opus Latest
OpenAI: o3 Mini and Anthropic: Claude Opus Latest are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | OpenAI: o3 Mini | Anthropic: Claude Opus Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 1M | 🏆 Anthropic: Claude Opus Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.10 | $5.00 | 🏆 OpenAI: o3 Mini |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $4.40 | $25.00 | 🏆 OpenAI: o3 Mini |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 Anthropic: Claude Opus Latest |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: o3 Mini better than Anthropic: Claude Opus Latest?
OpenAI: o3 Mini and Anthropic: Claude Opus Latest are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between OpenAI: o3 Mini and Anthropic: Claude Opus Latest?
Input: $1.10 vs $5.00 per 1M tokens. Output: $4.40 vs $25.00 per 1M tokens.
What context windows do OpenAI: o3 Mini and Anthropic: Claude Opus Latest support?
OpenAI: o3 Mini supports up to 200K tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both OpenAI: o3 Mini and Anthropic: Claude Opus Latest support tool calling?
OpenAI: o3 Mini: yes. Anthropic: Claude Opus Latest: yes.
Compare OpenAI: o3 Mini with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest