Claude Fable 5.1 vs GPT-6 Astra Pro

Price, context window & benchmark comparison

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Claude Fable 5.1

Anthropic
$10.00 / $50.00
Input / Output · per 1M tokens
VS
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GPT-6 Astra Pro

OpenAI
$10.00 / $50.00
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-6 Astra Pro has the larger context window (1.1M vs 1M).
Claude Fable 5.1GPT-6 Astra Pro
Input price / 1M$10.00$10.00
Output price / 1M$50.00$50.00
Blended price (3:1)$20.00$20.00
Cached input / 1M$0.25$1.00
Context window1M1.1M
Max output128K128K
Intelligence index53.4
Coding index81.6
Providers45
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-012026-09-04
Retirement

Cost calculator

FAQ

Which is cheaper, Claude Fable 5.1 or GPT-6 Astra Pro?

Claude Fable 5.1 and GPT-6 Astra Pro are priced identically.

Claude Fable 5.1 vs GPT-6 Astra Pro: which has a bigger context window?

Claude Fable 5.1: 1,000,000 tokens. GPT-6 Astra Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Fable 5.1 ≈ $45,000, GPT-6 Astra Pro ≈ $45,000.

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