Claude Fable 5 vs GPT-5.3-Codex
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Claude Fable 5 vs GPT-5.3-Codex: side by side
| Spec | Claude Fable 5 | GPT-5.3-Codex | Winner |
|---|---|---|---|
| Intelligence | 64.9 | 53.6 | Claude Fable 5 |
| Output speed | 63 t/s | 101 t/s | GPT-5.3-Codex |
| Output price | $50.00/1M | $14.00/1M | GPT-5.3-Codex |
| Context | 1000K | 400K | Claude Fable 5 |
| Params | — | — | Tie |
| Type | Proprietary | Proprietary | Tie |
| Provider | Anthropic | OpenAI | Tie |
Claude Fable 5
Pros
- +Coherent handling of very large contexts
- +Strong integration of text and visual inputs
- +Safety-aligned responses
- +Detailed file-based reasoning
Cons
- –May decline edge-case or sensitive requests
- –Slower inference on maximum context lengths
- –No native audio or video support
GPT-5.3-Codex
Pros
- +Specialized for programming workflows
- +Extensive context handling
- +Support for diverse input types
Cons
- –Narrower focus than general-purpose models
- –Performance tied to input quality
Frequently asked questions
It depends on your needs. Claude Fable 5 and GPT-5.3-Codex are both multimodal models; the comparison table above shows where each one leads on the metrics that matter. See the verdict for a recommendation.