Claude Fable 5 vs GPT-5.4 Pro
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.
Quick verdict: which should you choose?
Choose Claude Fable 5 if you need
- ✓Choose Claude Fable 5 if you need coherent handling of very large contexts at $50 per million tokens.
- ✓Choose Claude Fable 5 if you need safety-aligned responses and detailed file-based reasoning.
- ✓Choose Claude Fable 5 if you need strong text and visual input integration within a 1M-token window.
- ✓Choose Claude Fable 5 if you need to avoid the higher latency and cost of maximum-length inputs.
Choose GPT-5.4 Pro if you need
- ✓Choose GPT-5.4 Pro if you need a 1.05M-token context for extended multimodal tasks.
- ✓Choose GPT-5.4 Pro if you need advanced reasoning over very large text, image, and file inputs.
- ✓Choose GPT-5.4 Pro if you need versatile document and visual task handling despite higher cost.
- ✓Choose GPT-5.4 Pro if you need proprietary OpenAI access with usage constraints.
Verdict
Claude Fable 5 leads on price and has a published intelligence index of 59.9 while GPT-5.4 Pro offers a marginally larger context window. Both models provide strong text-image-file integration and lack native audio or video support. Claude Fable 5 is the clearer value choice for most large-context multimodal workloads given its 72% lower output price.
Claude Fable 5 vs GPT-5.4 Pro: side by side
| Spec | Claude Fable 5 | GPT-5.4 Pro | Winner |
|---|---|---|---|
| Intelligence | 59.9 | — | Tie |
| Output speed | — | — | Tie |
| Output price | $50.00/1M | $180.00/1M | Claude Fable 5 |
| Context | 1000K | 1050K | GPT-5.4 Pro |
| Params | — | — | Tie |
| Provider | Anthropic | OpenAI | Tie |
Detailed analysis
Pricing
Winner: Claude Fable 5Claude Fable 5 costs $50 per million output tokens while GPT-5.4 Pro costs $180 per million. The 3.6x price difference favors Claude Fable 5 for high-volume use. No other pricing details are provided.
Context Size
Winner: GPT-5.4 ProGPT-5.4 Pro provides 1,050,000 tokens versus Claude Fable 5's 1,000,000 tokens. The 50k-token advantage is modest but gives GPT-5.4 Pro the edge on maximum context length. Both support very large inputs.
Multimodal Capabilities
Winner: TieBoth models integrate text, image, and file data without native audio or video support. Claude Fable 5 emphasizes coherent large-context handling and safety alignment; GPT-5.4 Pro emphasizes advanced reasoning and versatility. Strengths are comparable on the stated dimensions.
Intelligence & Reasoning
Winner: Claude Fable 5Claude Fable 5 reports an intelligence_index of 59.9; no score is given for GPT-5.4 Pro. Both claim strong reasoning over extended contexts and file inputs. The published metric gives Claude Fable 5 the measurable advantage.
Claude Fable 5
Pros
- +Coherent handling of very large contexts
- +Strong integration of text and visual inputs
- +Safety-aligned responses
Cons
- –May decline edge-case or sensitive requests
- –Slower inference on maximum context lengths
- –No native audio or video support
GPT-5.4 Pro
Pros
- +Handles very large inputs across modalities
- +Strong integration of text, image, and file data
- +Advanced reasoning over extended contexts
Cons
- –Higher latency on maximum-length inputs
- –No native audio or video support
- –Proprietary access with usage constraints
Summary: Claude Fable 5 vs GPT-5.4 Pro
Select Claude Fable 5 when cost, safety alignment, and a known intelligence score matter most. Select GPT-5.4 Pro only when the extra 50k tokens or OpenAI-specific access outweighs the substantially higher price. For most multimodal workloads the facts favor Claude Fable 5 on value.
Frequently asked questions
Claude Fable 5 is better on price and published intelligence score; GPT-5.4 Pro is better only on the 50k-token context difference. No overall winner is declared without additional metrics.