GPT-6 Luna vs Claude Fable 5.1
Compare GPT-6 Luna vs Claude Fable 5.1 API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
GPT-6 Luna charges $0.10/1M input and $0.50/1M output tokens, compared to Claude Fable 5.1 at $10.00/1M input and $50.00/1M output. GPT-6 Luna is 100.0x cheaper on input tokens. In reasoning benchmarks, Claude Fable 5.1 holds the higher AA Intelligence Index rating (49/100). For latency-critical streaming, GPT-6 Luna delivers 103 t/s (77.0s TTFT) while Claude Fable 5.1 provides 88 t/s (155.0s TTFT).
Full Metric & Specification Comparison
| Metric | GPT-6 Luna | Claude Fable 5.1 | Advantage |
|---|---|---|---|
| Provider | OpenAI | Anthropic | - |
| Input Token Cost (1M) | $0.100 | $10.000 | GPT-6 Luna |
| Output Token Cost (1M) | $0.500 | $50.000 | GPT-6 Luna |
| Context Window | 1,050k tokens | 1,000k tokens | GPT-6 Luna |
| AA Intelligence Index | 28/100 | 49/100 | Claude Fable 5.1 |
| Streaming Latency | Fast | Moderate | - |
Key Architectural Takeaways
- Input Token Cost: GPT-6 Luna is $0.10/1M vs Claude Fable 5.1 at $10.00/1M
- Output Token Cost: GPT-6 Luna is $0.50/1M vs Claude Fable 5.1 at $50.00/1M
- Context Window: GPT-6 Luna supports 1,050k tokens vs Claude Fable 5.1 with 1,000k tokens
- Benchmark Intelligence Rating: GPT-6 Luna scores 28/100 vs Claude Fable 5.1 at 49/100 (AA Index v5)
- Inference Latency: GPT-6 Luna is rated Fast vs Claude Fable 5.1 rated Moderate
Calculate Your Team's Exact Bill Difference
Drag the sliders below to see real-time cost divergences based on your daily token consumption.
Deploying GPT-6 Luna over Claude Fable 5.1 saves $519.75/mo ($6237/yr) at this volume.
Frequently Asked Questions
Is GPT-6 Luna cheaper than Claude Fable 5.1?
GPT-6 Luna is significantly more economical, charging $0.10/1M input compared to $10.00/1M for Claude Fable 5.1.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose GPT-6 Luna. If you require peak reasoning accuracy and complex tool use, Claude Fable 5.1 is recommended.
How does context window compare between GPT-6 Luna and Claude Fable 5.1?
GPT-6 Luna offers the larger context window (1,050k tokens), allowing you to pass significantly larger codebases or documents without chunking.
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