o3-deep-research is OpenAI's advanced model for deep research, designed to tackle complex, multi-step research tasks. Note: This model always uses the 'web_search' tool which adds additional cost.
Model details →OpenAI: o3 Deep Research vs Anthropic: Claude Fable Latest
OpenAI: o3 Deep Research and Anthropic: Claude Fable 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 Fable family.
Model details →Side-by-side comparison
| Capability | OpenAI: o3 Deep Research | Anthropic: Claude Fable Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 200K | 1M | 🏆 Anthropic: Claude Fable Latest |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $10.00 | $10.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $40.00 | $50.00 | 🏆 OpenAI: o3 Deep Research |
| 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 Deep Research better than Anthropic: Claude Fable Latest?
OpenAI: o3 Deep Research and Anthropic: Claude Fable 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 Deep Research and Anthropic: Claude Fable Latest?
Input: $10.00 vs $10.00 per 1M tokens. Output: $40.00 vs $50.00 per 1M tokens.
What context windows do OpenAI: o3 Deep Research and Anthropic: Claude Fable Latest support?
OpenAI: o3 Deep Research supports up to 200K tokens. Anthropic: Claude Fable Latest supports up to 1M tokens.
Do both OpenAI: o3 Deep Research and Anthropic: Claude Fable Latest support tool calling?
OpenAI: o3 Deep Research: yes. Anthropic: Claude Fable Latest: yes.
Compare OpenAI: o3 Deep Research with other models
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