Compare / head-to-head
Claude Sonnet 5vsGPT-6 Astra
GPT-6 Astra leads 5 of 5 shared benchmarks. Claude Sonnet 5 is 5x cheaper per token. GPT-6 Astra has the larger context window (1.1M tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 5
GPT-6 Astra leads
Cheaper per token
Claude Sonnet 5
5x cheaper, input + output
Larger context
GPT-6 Astra
1.1M tokens
Provider uptime (30d)
100% · 95.4802%
Anthropic · OpenAI
Claude Sonnet 5
Anthropic · released 2026-06-30
textvision
GPT-6 Astra
OpenAI · released 2026-09-03
textvision
Quality
Benchmark matrix
5 shared · 3 only Claude Sonnet 5 · 2 only GPT-6 Astra| Benchmark | Claude Sonnet 5 | GPT-6 Astra | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| GPQA Diamond | 90.5% ↗epoch | 96% ↗ | -5.5 pt | GPT-6 Astra |
| FrontierMath Tier 4 v2 (Epoch AI run) | 29.3% ↗epoch | 97.6% ↗epoch | -68.3 pt | GPT-6 Astra |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 65.6% ↗epoch | 93.7% ↗epoch | -28.1 pt | GPT-6 Astra |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 94.7% ↗epoch | 100% ↗epoch | -5.3 pt | GPT-6 Astra |
| SimpleQA Verified | 33.7% ↗epoch | 75.6% ↗epoch | -41.9 pt | GPT-6 Astra |
| Only Claude Sonnet 5 reports · 3 | ||||
| SWE-bench Verified | 85.2% ↗ | not reported | — | — |
| Humanity's Last Exam (no tools) | 43.2% ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 57.4% ↗ | not reported | — | — |
| Only GPT-6 Astra reports · 2 | ||||
| AutomationBench | not reported | 41.4% ↗ | — | — |
| Terminal-Bench Science 0.1 | not reported | 64.6% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Sonnet 5 minus GPT-6 Astra in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Sonnet 5 | GPT-6 Astra | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1.1M tokens | GPT-6 Astra |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $2 ↗ | $10 ↗ | Claude Sonnet 5 |
| Output price / 1M | $10 ↗ | $50 ↗ | Claude Sonnet 5 |
| Cached input / 1M | $0.2 ↗ | $1 ↗ | Claude Sonnet 5 |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $12 | $60 | Claude Sonnet 5 |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-06-30 | 2026-09-03 | — |
| Cited benchmark scores | 8 | 8 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Sonnet 5 vs …
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GPT-6 Astra vs …
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Which one wins on your data?
Public benchmarks are a starting point. Run Claude Sonnet 5 and GPT-6 Astra on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.