--- title: "OpenAI: GPT-6 Astra — price, capability and what beats it · Undominated.ai" canonical: https://undominated.ai/models/openai__gpt-6-astra/ description: "OpenAI: GPT-6 Astra: $10.00/M in, $50.00/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper." --- # OpenAI: GPT-6 Astra — price, capability and what beats it · Undominated.ai > OpenAI: GPT-6 Astra: $10.00/M in, $50.00/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper. MODEL PROOF # GPT-6 Astra OpenAI · 04 Sept 2026 Balanced Summarise Chat Code gen Agentic BETTER + CHEAPER OPTION ## A stored alternative scores higher and costs less under this workload. **$20.00** / 1M tokens Balanced · 3 tokens in per 1 out GPT-5.5 · 21.9 points higher independent score · 44% lower measured price · $11.25 / 1M tokens Claude Opus 5 is a further stored option with these losses: 1.1M → 1.0M context Independent LMArena score 1,443.7 ± 11.64 · 2,693 votes Context window 1.05M Maximum output 128K Input modalities file, image, text Output modalities text Published input price $10.00 / 1M tokens Published output price $50.00 / 1M tokens Pricing kind fixed Context tiers Tiered by context Evidence as of 19 Sept 2026 openrouter/models LMArena · cc-by-4.0 Copy link Share Download landscape card MODEL MONUMENT ## Save or share this proof OpenAI: GPT-6 Astra. Balanced workload. Better and cheaper option available. Evidence as of 19 Sept 2026. Download landscape card — 1200 by 630 pixels Download square card — 1080 by 1080 pixels Copy landscape image Share landscape card $10.00/M in, $50.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. GPT-5.5 is both better and cheaper. ### Every price dimension | Input | $10.00 /M | | --- | --- | | Output | $50.00 /M | | Cached input | $1.00 /M | | Cache write | $12.50 /M | | Web search | $0.01 /call | **The headline rate does not apply to a long-context workload.** | Past 272,000 tokens | $20.00 /M in (2×) $75.00 /M out | | --- | --- | ### Who sells it The same weights, different shops. Cheapest is not like-for-like when serving precision differs. | Seller | Input | Output | Precision | Uptime (1d) | | --- | --- | --- | --- | --- | | Seller OpenAI | Input $5.00 | Output $25.00 | Precision undeclared | Uptime (1d) 100.00% | | Seller Azure | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) 99.96% | | Seller OpenAI | Input $10.00 | Output $50.00 | Precision undeclared | Uptime (1d) 100.00% | | Seller Azure | Input $11.00 | Output $55.00 | Precision undeclared | Uptime (1d) 100.00% | | Seller OpenAI | Input $20.00 | Output $100 | Precision undeclared | Uptime (1d) 100.00% | ### Independent scores | LMArena Elo | 1443.7 max | | --- | --- | LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero. ### Capability | Context window | 1.1M | | --- | --- | | Max output | 128K | | Input modes | file, image, text | | Tool use | yes | | Reasoning | always on | ### Provenance | Price source | openrouter.ai | | --- | --- | | Fetched | 2026-09-19 | | Quality data | verified | GPT-6 Astra is OpenAI's flagship model for demanding end-to-end work. It is suited for advanced analysis, software engineering, deep research, scientific work, and document creation, with particular strengths in long-horizon... ## Questions this page answers ### What does GPT-6 Astra cost? $10.00/M in, $50.00/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription. ### Does GPT-6 Astra have an independent quality score? GPT-6 Astra has an LMArena score in this catalogue. ### What beats GPT-6 Astra? GPT-5.5 is both better and cheaper. ### Does this page use Artificial Analysis scores for GPT-6 Astra? No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated. [Check whether this is still the one to buy](/check/openai__gpt-6-astra/) [Cheaper alternatives](/alternatives/openai__gpt-6-astra/) ## Related - Both better and cheaper [GPT-5.5](/models/openai__gpt-5.5/) - Higher score and cheaper, with a named trade [Claude Opus 5](/models/anthropic__claude-opus-5/) - Nearby on the capability axis [DeepSeek V4 Pro 0423](/models/deepseek__deepseek-v4-pro/) - Same vendor [GPT-5.6 Terra](/models/openai__gpt-5.6-terra/) - OpenAI models [OpenAI](/providers/openai/) - Where this model appears [disagreement](/disagreement/) - Nearby on the capability axis [Claude Sonnet 5](/models/anthropic__claude-sonnet-5/) - Same vendor [GPT-5.4](/models/openai__gpt-5.4/) - Where this model appears [cliffs](/cliffs/) - Nearby on the capability axis [Kimi K2.5](/models/moonshotai__kimi-k2.5/) - Same vendor [GPT-5.6 Sol](/models/openai__gpt-5.6-sol/) - Where this model appears [effort](/effort/) ## Badge The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not. Markdown Copy [![GPT-6 Astra — Undominated.ai dominance verdict](https://undominated.ai/badge/openai__gpt-6-astra.svg)](https://undominated.ai/models/openai__gpt-6-astra/) HTML Copy GPT-6 Astra — Undominated.ai dominance verdict Direct file: [https://undominated.ai/badge/openai__gpt-6-astra.svg](https://undominated.ai/badge/openai__gpt-6-astra.svg) — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never older than the last deploy.