#19OpenAI· released 2026-09-04

OpenAI: GPT-6 Astra Pro.

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

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Context
1.1M
Input $/1M
$10.00
Output $/1M
$50.00
Modality
file · image · text

Benchmarks

How these are aggregated →
Arena Elo
1520
LMArena — human blind votes
AA Index
72.0
Artificial Analysis composite
LiveBench
84.2
Contamination-resistant
GPQA
88.2%
Grad-level science reasoning
MMLU-Pro
88.7%
Broad knowledge
SWE-bench
76.9%
Real GitHub bugs (Verified)
Terminal-Bench
61.7%
Agentic shell tasks
ARC-AGI
28.5%
Abstract reasoning
Aider Polyglot
85.7%
Multi-language code editing
Speed
43 tok/s
Median output speed

Profile

OpenAI: GPT-6 Astra Pro is OpenAI's entry at position #19 on the current aggregated leaderboard. Its strongest signals are graduate-level science reasoning, real-world software engineering, unattended agentic work, and very long context. Every figure below is aggregated from the public sources listed on the homepage and refreshed on each pipeline run.

The score spread is comparatively complete for this model, but the standing advice still applies: treat gaps of a few points as ties and validate on your own workload before committing.

How this model's position is computed is documented in the methodology; what each benchmark actually measures is in the benchmark guide. See a figure that disagrees with its source? Report it — accepted corrections apply on the next refresh.

Nearby on the leaderboard