The o-series of models are trained with reinforcement learning to think before they answer and perform complex reasoning. The o3-pro model uses more compute to think harder and provide consistently...
Model details →OpenAI: o3 Pro vs Anthropic: Claude Opus Latest
Anthropic: Claude Opus Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | OpenAI: o3 Pro | 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. | $20.00 | $5.00 | 🏆 Anthropic: Claude Opus Latest |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $80.00 | $25.00 | 🏆 Anthropic: Claude Opus 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: o3 Pro better than Anthropic: Claude Opus Latest?
Anthropic: Claude Opus Latest wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: o3 Pro and Anthropic: Claude Opus Latest?
Input: $20.00 vs $5.00 per 1M tokens. Output: $80.00 vs $25.00 per 1M tokens.
What context windows do OpenAI: o3 Pro and Anthropic: Claude Opus Latest support?
OpenAI: o3 Pro supports up to 200K tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both OpenAI: o3 Pro and Anthropic: Claude Opus Latest support tool calling?
OpenAI: o3 Pro: yes. Anthropic: Claude Opus Latest: yes.
Compare OpenAI: o3 Pro with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest