Claude Opus 4.5 vs GPT-6 Astra
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Opus 4.5 by Anthropic wins on 3 of 5 benchmarks against GPT-6 Astra by OpenAI, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Reasoning: In reasoning, GPT-6 Astra scores 94.4% on GPQA Diamond compared to Claude Opus 4.5's 86.5%.
Context: In context, GPT-6 Astra scores 1.1M on Context Length compared to Claude Opus 4.5's 200K.
Pricing Comparison
Claude Opus 4.5 costs $5.0/1M input tokens and $25.0/1M output tokens, while GPT-6 Astra costs $10.0/1M input and $50.0/1M output. Claude Opus 4.5 is the more affordable option for API usage.
Verdict
Claude Opus 4.5 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Opus 4.5 vs GPT-6 Astra — FAQ
Which is better, Claude Opus 4.5 or GPT-6 Astra?
Claude Opus 4.5 wins on more benchmarks overall (3 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Opus 4.5 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 Opus 4.5 cheaper than GPT-6 Astra?
Yes, Claude Opus 4.5 is cheaper. Claude Opus 4.5 costs $5.0/1M input and $25.0/1M output tokens. GPT-6 Astra costs $10.0/1M input and $50.0/1M output tokens.
Which is faster, Claude Opus 4.5 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 Opus 4.5 vs GPT-6 Astra comparison cover?
This comparison covers 5 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.