GPT-6 Astra (Fast)

Tool callingStructured outputReasoningImage inputFile input

Model card Launch post Website Docs

Fast variant of GPT-6 Astra for low-latency assistance and high-volume workloads.

Context: 1.1M
Released: 1mo ago

Sources:models.dev

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

No benchmark results have been matched to this model yet.

Specifications

Developer: OpenAI
Model family: GPT
Type: Language model
Predecessor: —
Successor: —
Released: September 4, 2026
Model ID: openai/gpt-6-astra-fast
Openness: Closed
License: —
Input modalities: text, image, file
Output modalities: text
Modality: text+image+file->text
Max output tokens: 128K
Hugging Face: —
Source freshness: Metadata synced Oct 8, 2026, 10:17 PM UTC

Additional source evidence

Source model: openai/gpt-6-astra-fast
Source family: gpt-astra
Last updated: 2026-09-04
Model context: 1.1M
Maximum input: 922K
Model output limit: 128K
Open weights: No
File attachments: Yes
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
Temperature control: No

Complete source record (JSON)

{
  "id": "openai/gpt-6-astra-fast",
  "name": "GPT-6 Astra (Fast)",
  "description": "Fast variant of GPT-6 Astra for low-latency assistance and high-volume workloads.",
  "family": "gpt-astra",
  "last_updated": "2026-09-04",
  "attachment": true,
  "reasoning": true,
  "tool_call": true,
  "structured_output": true,
  "temperature": false,
  "modalities": {
    "input": [
      "text",
      "image",
      "pdf"
    ],
    "output": [
      "text"
    ]
  },
  "limit": {
    "context": 1050000,
    "input": 922000,
    "output": 128000
  },
  "release_date": "2026-09-04",
  "open_weights": false
}

Infrastructure

Provider availability

All providers

Provider endpoint data will appear after this model's first OpenRouter endpoint sync.

Text provenance

EU · product-scoped

OpenAI textGrain watermarking

In the EU, ChatGPT-generated text uses textGrain. OpenAI says API customers can opt in globally for select models, so watermarking depends on the product surface and configuration.

Official explanation