Claude Opus 5 vs GPT-6 Astra
API pricing, context window and capabilities for Claude Opus 5 and GPT-6 Astra, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersClaude Opus 5 wins on price and on Terminal-Bench. GPT-6 Astra wins on intelligence and on context window.
Price
Claude Opus 5
Terminal-Bench
Claude Opus 5
Intelligence
GPT-6 Astra
Context window
GPT-6 Astra
Key takeaways
who wins on what, from the published numbersClaude Opus 5 wins
- Cheaper input ($5.00 vs $10.00 /1M)
- Cheaper output ($25.00 vs $50.00 /1M)
- More serving providers (9 vs 5)
GPT-6 Astra wins
- Larger context window (1M vs 1.1M)
Cheaper overall
Claude Opus 5
$5.00 + $25.00 /1M
Larger context
GPT-6 Astra
1.1M
More providers
Claude Opus 5
9 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
| Claude Opus 5 | GPT-6 Astra | |
|---|---|---|
| Input $/1M | $5.00via Anthropic best | $10.00via OpenAI |
| Output $/1M | $25.00via Anthropic best | $50.00via OpenAI |
| Context window | 1M | 1.1M best |
| Max output | 128K | 128K |
| Serving providers | 9 best | 5 |
| Date | Released Jul 24, 2026 | Released Sep 4, 2026 |
Benchmarks
Benchmark scores, side by side| Claude Opus 5 | GPT-6 Astra | |
|---|---|---|
| Intelligence | 50.8 | 52.7 best |
| Terminal-Bench | 89% best | 88% |
| GPQA Diamond | 93% | 96% best |
| Output speed | 56 t/s | 61 t/s best |
| Latency (TTFT) | 107.27s best | 280.05s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Claude Opus 5
via OpenRouter
$50
GPT-6 Astra
via OpenAI
$100
Capabilities
feature support, side by side| Feature | Claude Opus 5 | GPT-6 Astra |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Claude Opus 5 or GPT-6 Astra?
Claude Opus 5 is cheaper for input ($5.00 vs $10.00 per 1M tokens) from Anthropic. Claude Opus 5 is cheaper for output ($25.00 vs $50.00 per 1M tokens) from Anthropic.
What is the context window difference between Claude Opus 5 and GPT-6 Astra?
Claude Opus 5 has a 1M-token context window and GPT-6 Astra has 1.1M tokens, so GPT-6 Astra can take a larger prompt.
How do Claude Opus 5 and GPT-6 Astra compare on benchmarks?
On the tracked benchmarks, Claude Opus 5 leads on Terminal-Bench, and GPT-6 Astra leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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