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: o3 Pro (batch)
Anthropic: Claude Fable 5 and OpenAI: o3 Pro (batch) are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
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 →Side-by-side comparison
| Capability | Anthropic: Claude Fable 5 | OpenAI: o3 Pro (batch) | 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 | $10.00 | Tie |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $50.00 | $40.00 | 🏆 OpenAI: o3 Pro (batch) |
| 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: o3 Pro (batch)?
Anthropic: Claude Fable 5 and OpenAI: o3 Pro (batch) are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Fable 5 and OpenAI: o3 Pro (batch)?
Input: $10.00 vs $10.00 per 1M tokens. Output: $50.00 vs $40.00 per 1M tokens.
What context windows do Anthropic: Claude Fable 5 and OpenAI: o3 Pro (batch) support?
Anthropic: Claude Fable 5 supports up to 1M tokens. OpenAI: o3 Pro (batch) supports up to 200K tokens.
Do both Anthropic: Claude Fable 5 and OpenAI: o3 Pro (batch) support tool calling?
Anthropic: Claude Fable 5: yes. OpenAI: o3 Pro (batch): yes.
Compare Anthropic: Claude Fable 5 with other models
vs Anthropic Claude Haiku Latestvs Anthropic Claude Sonnet Latestvs Anthropic: Claude Fable Latestvs Anthropic: Claude Opus Latest