Claude Sonnet 4.6 vs GPT-6 Astra
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-6 Astra by OpenAI wins on 5 of 8 benchmarks against Claude Sonnet 4.6 by Anthropic, which leads on 3. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
General Intelligence: In general intelligence, GPT-6 Astra scores 52.8 on AA Intelligence Index compared to Claude Sonnet 4.6's 30.5.
Coding: In coding, GPT-6 Astra scores 76.9 on AA Coding Index compared to Claude Sonnet 4.6's 63.
Reasoning: In reasoning, GPT-6 Astra scores 94.4% on GPQA Diamond compared to Claude Sonnet 4.6's 54.3%, while GPT-6 Astra scores 51.5 on AA Agentic Index compared to Claude Sonnet 4.6's 33.1.
Context: In context, GPT-6 Astra scores 1.1M on Context Length compared to Claude Sonnet 4.6's 1.0M.
Pricing Comparison
Claude Sonnet 4.6 costs $3.0/1M input tokens and $15.0/1M output tokens, while GPT-6 Astra costs $10.0/1M input and $50.0/1M output. Claude Sonnet 4.6 is the more affordable option for API usage.
Verdict
Claude Sonnet 4.6 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Sonnet 4.6 vs GPT-6 Astra — FAQ
Which is better, Claude Sonnet 4.6 or GPT-6 Astra?
GPT-6 Astra wins on more benchmarks overall (5 vs 3). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Sonnet 4.6 compare to GPT-6 Astra for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Claude Sonnet 4.6 cheaper than GPT-6 Astra?
Yes, Claude Sonnet 4.6 is cheaper. Claude Sonnet 4.6 costs $3.0/1M input and $15.0/1M output tokens. GPT-6 Astra costs $10.0/1M input and $50.0/1M output tokens.
Which is faster, Claude Sonnet 4.6 or GPT-6 Astra?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Claude Sonnet 4.6 vs GPT-6 Astra comparison cover?
This comparison covers 8 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, AA Intelligence Index, AA Coding Index, AA Agentic Index, Cached Input Cost. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.