Claude Fable 5 vs GPT-5.4
API pricing, context window and capabilities for Claude Fable 5 and GPT-5.4, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Fable 5 wins on coding and on intelligence. GPT-5.4 wins on price and on context window.
Price
GPT-5.4
Coding
Claude Fable 5
Intelligence
Claude Fable 5
Context window
GPT-5.4
Key takeaways
who wins on what, from the published numbersClaude Fable 5 wins
- More serving providers (4 vs 2)
GPT-5.4 wins
- Cheaper input ($10.00 vs $2.50 /1M)
- Cheaper output ($50.00 vs $15.00 /1M)
- Larger context window (1M vs 1.1M)
- Has web search
Cheaper overall
GPT-5.4
$2.50 + $15.00 /1M
Larger context
GPT-5.4
1.1M
More providers
Claude Fable 5
4 providers
Pricing & specs
cheapest serving route · per 1M tokens| Claude Fable 5 | GPT-5.4 | |
|---|---|---|
| Input $/1M | $10.00 | $2.50 best |
| Output $/1M | $50.00 | $15.00 best |
| Context window | 1M | 1.1M best |
| Max output | 128K | 128K |
| Serving providers | 4 best | 2 |
| Released | 2026-06-09 | 2026-03-05 |
Benchmarks
Artificial Analysis indices, side by side| Claude Fable 5 | GPT-5.4 | |
|---|---|---|
| Intelligence | 59.9 best | 51.4 |
| Coding | 76.5 best | 71.0 |
| GPQA Diamond | 93% best | 92% |
| Output speed | 46 t/s | 144 t/s best |
| Latency (TTFT) | 29.29s | 27.88s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Fable 5
via Amazon Bedrock
$100
GPT-5.4
via Azure
$28
Capabilities
feature support, side by side| Feature | Claude Fable 5 | GPT-5.4 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Fable 5 or GPT-5.4?
GPT-5.4 is cheaper for input ($10.00 vs $2.50 per 1M tokens). GPT-5.4 is cheaper for output ($50.00 vs $15.00 per 1M tokens).
What is the context window difference between Claude Fable 5 and GPT-5.4?
Claude Fable 5 has a 1M-token context window and GPT-5.4 has 1.1M tokens, so GPT-5.4 can take a larger prompt.
How do Claude Fable 5 and GPT-5.4 compare on benchmarks?
On the tracked Artificial Analysis indices, Claude Fable 5 leads on coding, and Claude Fable 5 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
Every weekday
AI moves fast. Here's your debrief.
News, analysis, tools, and more.
For people who build with AI