Claude Sonnet 4 vs GPT-6 Astra Pro

Price, context window & benchmark comparison

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Claude Sonnet 4

Anthropic
$3.00 / $15.00
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: Claude Sonnet 4 is 3.3× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix. GPT-6 Astra Pro has the larger context window (1.1M vs 200K).
Claude Sonnet 4GPT-6 Astra Pro
Input price / 1M$3.00$10.00
Output price / 1M$15.00$50.00
Blended price (3:1)$6.00$20.00
Cached input / 1M$0.30$1.00
Context window200K1.1M
Max output64K128K
Intelligence index——
Coding index37.6—
Providers—5
Best provider uptime (30m)—100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2025-05-222026-09-04
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Sonnet 4 or GPT-6 Astra Pro?

Claude Sonnet 4 is 3.3× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix.

Claude Sonnet 4 vs GPT-6 Astra Pro: which has a bigger context window?

Claude Sonnet 4: 200,000 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 Sonnet 4 ≈ $13,500, GPT-6 Astra Pro ≈ $45,000.

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