Claude Opus 5 vs GPT-6 Astra: Specs & Benchmark Comparison
Claude Opus 5 is developed by Anthropic, while GPT-6 Astra comes from OpenAI. Claude Opus 5 was released in July 2026, and GPT-6 Astra followed 2 months later in September 2026.
The two models share 8 published benchmarks. GPT-6 Astra leads on 7 of them, Claude Opus 5 on 1. The widest gaps are on ARC-AGI-3, where GPT-6 Astra scores 99.9% against 30.2%; AutomationBench, where GPT-6 Astra scores 41.4% against 26.0%. Averaged across everything we track, Claude Opus 5 sits at 55.0% and GPT-6 Astra at 74.4%.
Claude Opus 5 is the cheaper API at $5 per million input tokens and $25 per million output tokens, roughly 2 times cheaper than GPT-6 Astra at $10 and $50. Both accept a context window of about 1M tokens. Both accept text and images as input.
| Characteristic | Claude Opus 5 | GPT-6 Astra |
|---|---|---|
| Company | Anthropic | OpenAI |
| Release Date | July 24, 2026 | September 4, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 128K | 128K |
| Input Price / 1M | $5.00 | $10.00 |
| Output Price / 1M | $25.00 | $50.00 |
| Average Score | 55.0% | 74.4% |
| Benchmarks | ||
| ARC-AGI-3 | 30.2% | 99.9% |
| AutomationBench | 26.0% | 41.4% |
| Terminal-Bench 4.0 | 51.8% | 57.7% |
| DeepSWE 1.1 | 68.8% | 74.1% |
| HealthBench Professional | 59.8% | 63.4% |
| OSWorld 2.0 | 70.6% | 72.6% |
| BrowseComp | 90.8% | 91.5% |
| FrontierCode 1.1 | 53.4% | 53.3% |
Visual Benchmark Comparison
Verdict
GPT-6 Astra leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Claude Opus 5 — 0.5, GPT-6 Astra — 0.7.
Claude Opus 5 is 2.0x cheaper: input $5.00/1M vs $10.00/1M tokens.
GPT-6 Astra supports a larger context: 1M vs 1M tokens.
GPT-6 Astra is newer: released 9/4/2026 vs 7/24/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 or GPT-6 Astra?
Which model is cheaper — Claude Opus 5 or GPT-6 Astra?
Which has a larger context window — Claude Opus 5 or GPT-6 Astra?
The Claude Opus 5 and GPT-6 Astra comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 5 or GPT-6 Astra page. See also the complete list of AI model comparisons.