MODEL PROOF
GPT-6 Astra Pro
NOT INDEPENDENTLY RATED
No independent LMArena score is published for this model.
- Independent LMArena score
- Not independently rated
- 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
MODEL MONUMENT
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OpenAI: GPT-6 Astra Pro. Balanced workload. Not independently rated. Evidence as of 19 Sept 2026.
$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-6 Astra Pro has no independent quality score. Unrated is not a score of zero.
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) |
|---|---|---|---|---|
| OpenAI | $5.00 | $25.00 | undeclared | 100.00% |
| Azure | $10.00 | $50.00 | undeclared | 99.77% |
| OpenAI | $10.00 | $50.00 | undeclared | 99.96% |
| Azure | $11.00 | $55.00 | undeclared | — |
| OpenAI | $20.00 | $100 | undeclared | 100.00% |
Independent scores
No independent benchmark has measured this model. Unrated 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 | unrated |
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Questions this page answers
What does GPT-6 Astra Pro 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 Pro have an independent quality score?
GPT-6 Astra Pro has no independent quality score in this catalogue. Unrated is not a score of zero.
What beats GPT-6 Astra Pro?
GPT-6 Astra Pro has no independent quality score. Unrated is not a score of zero.
Does this page use Artificial Analysis scores for GPT-6 Astra Pro?
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
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.
[](https://undominated.ai/models/openai__gpt-6-astra-pro/)<a href="https://undominated.ai/models/openai__gpt-6-astra-pro/"><img src="https://undominated.ai/badge/openai__gpt-6-astra-pro.svg" alt="GPT-6 Astra Pro — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/openai__gpt-6-astra-pro.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.
