Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and...
Model details →Anthropic: Claude Fable 5 vs OpenAI: o1
Anthropic: Claude Fable 5 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding. The o1 model series is trained with large-scale reinforcement learning to reason...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Fable 5 | OpenAI: o1 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 200K | 🏆 Anthropic: Claude Fable 5 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $10.00 | $15.00 | 🏆 Anthropic: Claude Fable 5 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $50.00 | $60.00 | 🏆 Anthropic: Claude Fable 5 |
| 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 Anthropic: Claude Fable 5 better than OpenAI: o1?
Anthropic: Claude Fable 5 wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between Anthropic: Claude Fable 5 and OpenAI: o1?
Input: $10.00 vs $15.00 per 1M tokens. Output: $50.00 vs $60.00 per 1M tokens.
What context windows do Anthropic: Claude Fable 5 and OpenAI: o1 support?
Anthropic: Claude Fable 5 supports up to 1M tokens. OpenAI: o1 supports up to 200K tokens.
Do both Anthropic: Claude Fable 5 and OpenAI: o1 support tool calling?
Anthropic: Claude Fable 5: yes. OpenAI: o1: yes.
Compare Anthropic: Claude Fable 5 with other models
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