Claude Fable 5 vs GPT-5.4
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 higher intelligence scoring at 59.9 for complex reasoning.
- ✓Choose Claude Fable 5 if you need safety-aligned responses and detailed file-based reasoning.
- ✓Choose Claude Fable 5 if you need coherent handling of very large contexts with strong text-visual integration.
Choose GPT-5.4 if you need
- ✓Choose GPT-5.4 if you need faster output at 156.68 t/s and lower pricing of $15 per million tokens.
- ✓Choose GPT-5.4 if you need a slightly larger 1.05M context window for extremely large-scale tasks.
- ✓Choose GPT-5.4 if you need flexible multimodal workflows and strong document-level performance.
Verdict
Claude Fable 5 leads with a higher intelligence index of 59.9 and strengths in safety-aligned, coherent large-context reasoning, while GPT-5.4 offers clear advantages in speed at 156.68 t/s and lower price of $15 per million tokens. Both handle million-token multimodal contexts with text and image integration but lack audio or video support. GPT-5.4 edges ahead for high-volume or cost-sensitive document tasks, whereas Claude Fable 5 suits users prioritizing detailed, aligned outputs.
Claude Fable 5 vs GPT-5.4: side by side
| Spec | Claude Fable 5 | GPT-5.4 | Winner |
|---|---|---|---|
| Intelligence | 59.9 | 51.4 | Claude Fable 5 |
| Output speed | — | 157 t/s | Tie |
| Output price | $50.00/1M | $15.00/1M | GPT-5.4 |
| Context | 1000K | 1050K | GPT-5.4 |
| Params | — | — | Tie |
| Provider | Anthropic | OpenAI | Tie |
Detailed analysis
Intelligence
Winner: Claude Fable 5Claude Fable 5 scores 59.9 on the intelligence index compared to GPT-5.4's 51.4. This gap supports stronger performance in coherent large-context reasoning and safety-aligned responses. GPT-5.4 remains competitive for standard multimodal tasks but trails on this metric.
Pricing
Winner: GPT-5.4GPT-5.4 costs $15 per million output tokens versus Claude Fable 5 at $50 per million. The threefold price difference favors GPT-5.4 for high-volume usage. Both are proprietary models from established providers with no other cost details provided.
Speed and Context
Winner: GPT-5.4GPT-5.4 provides a measured speed of 156.68 tokens per second and a 1.05M context window. Claude Fable 5 has a 1M context but lists slower inference on maximum lengths with unknown speed. Both support large multimodal inputs yet note latency increases at scale.
Multimodal Capabilities
Winner: TieBoth models integrate text and visual inputs without native audio or video support. Claude Fable 5 emphasizes safety-aligned and detailed file reasoning, while GPT-5.4 highlights seamless integration and flexible workflows. Strengths overlap on document-level multimodal handling.
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
Pros
- +Handles extremely large contexts
- +Seamless text-image-file integration
- +Strong at document-level tasks
Cons
- –No native audio or video support
- –Large context can increase latency
- –May need careful prompting for complex tasks
Summary: Claude Fable 5 vs GPT-5.4
Users prioritizing intelligence, safety, and detailed reasoning should select Claude Fable 5. Those needing speed, lower cost, and slightly larger context should choose GPT-5.4. The models are closely matched on core multimodal context handling but diverge on measurable performance and economics.
Frequently asked questions
Claude Fable 5 scores higher on intelligence at 59.9 while GPT-5.4 leads on speed and price; the better choice depends on whether intelligence or cost-speed matters more for the workload.