GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...
Model details →OpenAI: GPT-5.4 Pro vs Anthropic: Claude Fable Latest
Anthropic: Claude Fable Latest wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Fable family.
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.4 Pro | Anthropic: Claude Fable Latest | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.1M | 1M | 🏆 OpenAI: GPT-5.4 Pro |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $30.00 | $10.00 | 🏆 Anthropic: Claude Fable Latest |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $180.00 | $50.00 | 🏆 Anthropic: Claude Fable 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: GPT-5.4 Pro better than Anthropic: Claude Fable Latest?
Anthropic: Claude Fable Latest wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.4 Pro and Anthropic: Claude Fable Latest?
Input: $30.00 vs $10.00 per 1M tokens. Output: $180.00 vs $50.00 per 1M tokens.
What context windows do OpenAI: GPT-5.4 Pro and Anthropic: Claude Fable Latest support?
OpenAI: GPT-5.4 Pro supports up to 1.1M tokens. Anthropic: Claude Fable Latest supports up to 1M tokens.
Do both OpenAI: GPT-5.4 Pro and Anthropic: Claude Fable Latest support tool calling?
OpenAI: GPT-5.4 Pro: yes. Anthropic: Claude Fable Latest: yes.
Compare OpenAI: GPT-5.4 Pro with other models
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