OpenAI · in Borg

GPT-6 Astra

GPT-6 Astra is the most capable GPT-6 tier for difficult end-to-end work.

Reasoning1,050,000 tokenstext, image

1,050,000 tokensContext window

4780 msMedian time to first token (gateway proxy)

16Output tokens per second (whole turn)

99.6%Request success

$10 / $50Vendor API price in / out · per 1M

Included in Borg

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At a glance

Specification	Value
Provider	OpenAI
Family	GPT
Release date	2026-09-03 Vendor source
Context window	1,050,000 tokens Vendor source
Input modalities	text, image
Output modalities	text
Reasoning	Yes
Open weights	No
Knowledge cutoff	2026-04-30 Vendor source
Borg lane ids	`gpt-6-astra`, `openai/gpt-6-astra`
Median time to first token (gateway proxy) on Borg	4780 ms
Median tokens per second (end to end) on Borg	16 output tokens per second

Not published by the vendor: thinking modes, fusion roles.

What GPT-6 Astra is good for

GPT-6 Astra is the most capable GPT-6 tier for difficult end-to-end work. It emphasizes depth over the lower-cost Sol and Luna siblings and does not offer none reasoning effort. It accepts text and image inputs and generates text, with adjustable reasoning effort. The documented large context capacity is useful for substantial inputs, though unusually long API requests may be charged differently. Evaluate response quality against the neighboring tiers before committing a workflow, since matching context windows do not imply matching capability. Borg includes this lane in its subscription; Borg Fusion can route to it, or you can select its lane directly for a fixed model choice.

hard coding assignments
computer-use research
long-form document creation
evaluating long-input workflows

How Borg uses it

GPT-6 Astra is available as a subscription catalog lane in Borg. The catalog does not publish which Fusion profiles route to this model, so no routing role is claimed here. You can pick it directly by setting the OpenAI-compatible gateway model field to a listed lane id. Check the current catalog for availability before building a workflow around a lane.

model: "gpt-6-astra"

Measured on Borg

Metric	Median	95th percentile	Samples
Time to first token (gateway proxy)	4780 ms	17930 ms	1335
Tokens per second (end to end)	16 output tokens per second	33.9 output tokens per second	18243
Request success rate	99.6%	—	2222

Time to first token (gateway proxy)

Lower is fasterFleet median 3971.5 ms

GPT-6 Astra4780 ms

Output tokens per second (whole turn)

Higher is fasterFleet median 31.9 tokens/s

GPT-6 Astra16 tokens/s

Time to first token (gateway proxy): time until the first streamed response event reaches the gateway; our closest available measure of time to first token
Tokens per second (end to end): tokens per second, end to end: provider-reported output tokens divided by the whole turn's elapsed time, including queueing and reasoning; not a streaming per-token rate

Share of requests Borg completed successfully, excluding requests the client cancelled.

Completion speed covers the whole turn including queueing and reasoning time; it is not a streaming tokens-per-second figure.

Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 20969 requests. Minimum 100 samples per published request metric.

Borg coding bench

Hard-graded with tests plus lint, no LLM judge; 3 tasks, 15 runs, 2026-09-20.

Metric	Pass rate
Overall pass rate	67%
Hidden-test pass rate	73%

Source: Borg coding bench, hard-graded by tests and ruff; no LLM judge

Pricing

Included in Borg subscription. Vendor API list price: $10 input / $50 output per 1M tokens. Vendor price source.

Standard global rates for prompts up to 272,000 input tokens. Above 272,000 input tokens, input and cached-input rates are 2× and output rates are 1.5× for the full request. Vendor pricing terms

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FAQ

What is GPT-6 Astra?

GPT-6 Astra is listed in Borg's subscription catalog as gpt-6-astra. GPT-6 Astra is the most capable GPT-6 tier for difficult end-to-end work.

Is GPT-6 Astra in Borg?

Yes. GPT-6 Astra is listed in Borg's subscription catalog under the lane gpt-6-astra. You can choose the lane directly, or explore the available Fusion profiles. Availability and model details can change; check the current catalog before deployment.

What context window does GPT-6 Astra have?

The published context window is 1,050,000 tokens. Consult the cited sources for details and current limits. Vendor source

Is GPT-6 Astra good for coding?

No vendor-published coding evaluation is listed here. Its listed uses include hard coding assignments, computer-use research, long-form document creation, evaluating long-input workflows. Try the lane for your own tasks, and compare the output with your requirements before choosing a default.

How fast is GPT-6 Astra on Borg?