Claude Fable 5 vs GPT-6 Astra
Pricing verdict: Claude Fable 5 vs GPT-6 Astra: pricing is a tie at $10.00/M input and $50.00/M output. The real choice is context: GPT-6 Astra is better for long-context tasks (1,050,000 tokens vs 1,000,000).
Direct answer: pricing is a tie. Choose GPT-6 Astra for the larger 1.1M context window, or pick Claude Fable 5 if 1M is already enough for your workload.
Compare API pricing, input and output token costs, context windows, and monthly estimates on one page so you can pick the right model fast.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Fable 5
GPT-6 Astra
Cost Differences
Both models cost the same at the default workload.
Quick Recommendation
Direct API pricing is a tie at the default workload: both land around $105.00/month. Pick GPT-6 Astra if you need the larger 1.1M context window; otherwise choose the model that better fits your workflow.
Feature Comparison
| Feature | Claude Fable 5 | GPT-6 Astra |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $10.00/1M tokens | $10.00/1M tokens |
| Output Price | $50.00/1M tokens | $50.00/1M tokens |
| Context Window | 1,000,000 tokens | 1,050,000 tokens |
| Max Output | 128,000 tokens | 128,000 tokens |
| Category | flagship | flagship |
| Capabilities | textvisionreasoningcode | textvisioncodereasoning |
| Release Date | 6/9/2026 | 9/3/2026 |
Claude Fable 5 vs GPT-6 Astra: Which Should You Choose?
Choosing between Claude Fable 5 and GPT-6 Astra depends on your priorities: cost efficiency, context length, or raw capability. Both models cost the same on input and output tokens, so raw price is a tie. Meanwhile, GPT-6 Astra offers a significantly larger context window at 1,050,000 tokens vs 1,000,000 for Claude Fable 5.
These models come from different providers — Anthropic and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
Both models are in the flagship category, making this a direct head-to-head comparison. At scale — say 10,000 requests per day — direct API pricing stays tied, so the real decision is context, latency, and provider fit.
Output costs matter too. Claude Fable 5 charges $50.00/1M output tokens vs $50.00 for GPT-6 Astra.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude Fable 5 when:
- • You're already using Anthropic's API ecosystem
Choose GPT-6 Astra when:
- • You need a larger context window (1,050,000 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Claude Fable 5
- • Input pricing: $10.00/M tokens
- • Output pricing: $50.00/M tokens
- • Context window: 1,000,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Smaller context window than GPT-6 Astra
GPT-6 Astra
- • Input pricing: $10.00/M tokens
- • Output pricing: $50.00/M tokens
- • Context window: 1,050,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Trade-offs are minor in this matchup.
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Fable 5 (Anthropic)
GPT-6 Astra (OpenAI)
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Which is cheaper, Claude Fable 5 or GPT-6 Astra?▼
What is the context window difference between Claude Fable 5 and GPT-6 Astra?▼
Which model is better for AI Agent / Agentic Workflows?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Anthropic and OpenAI API pricing beyond this model matchup?▼
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