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GPT-6 Astra vs Claude Opus 5
Of the 6 public leaderboards that rate both, GPT-6 Astra scores higher on 5 and Claude Opus 5 on 1. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GPT-6 Astra is at 89.2 and Claude Opus 5 at 84.8 (out of 100).
Scores as published by each board; table composed September 24, 2026.
Leaderboard by leaderboard
| Board | GPT-6 Astra | Claude Opus 5 | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,792.2 | 1,692.4 | GPT-6 Astra |
| LiveBench global average (0-100) | 82.2 | 80.1 | GPT-6 Astra |
| SimpleBench AVG@5 % (private set) | 86.5 | 80.6 | GPT-6 Astra |
| LLM Stats LLM Stats Score · composite (0-100), their rendered top 15 | 59.5 | 54.8 | GPT-6 Astra |
| Vals AI Vals Index accuracy % · weighted finance + coding tasks | 66.6 | 67.2 | Claude Opus 5 |
| Artificial Analysis intelligence index · measured runs only | 52.7 | 50.8 | GPT-6 Astra |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
GPT-6 Astra at a glance
- Developer
- OpenAI
- Status
- Live since September 3, 2026
Live — Sep 3, Trusted Access enterprises first; our own sweep read the plain id on OpenRouter at the base sticker Sep 4 21:16 UTC (openai/gpt-6-astra, $10/$50), and the Fast tier the same night (vercel/openai/gpt-6-astra-fast, $20/$100) · $10/$50 per 1M, $1 cached, 1.05M ctx / 128K out · AA Coding Agent Index 67 (≈ Opus 5, Fable 5), Intelligence Index 61 (= GPT-5.6 Sol, 5 below Fable 5.1).
GPT-6 Astra is out — Fable 5.1's sticker, trusted access first, public API within days
2026-09-03 · OpenAI shipped GPT-6 Astra today. Its own words, from the model documentation: "Our most capable model, built for the hardest end-to-end work" — complex reasoning, coding, computer use, research and document creation.
OpenAI is treating Astra as its first Critical cyber model — and slowing it down, 24 hours after the leaks said next week
2026-08-07 · Twenty-four hours ago both accounts we track said Astra was launching next week. Today OpenAI published that it is slowing the model down, and the reason outranks any launch calendar.
Claude Opus 5 at a glance
- Developer
- Anthropic
- Status
- Live since July 24, 2026
Live — detected 16:51 UTC Jul 24, alert fired 61s later · superseded by Opus 5.5 on Sep 22 and moved to Anthropic's legacy list; still served at $5/$25, which is now MORE than its successor.
Claude Opus 5 is live — we detected it at 16:51 UTC and had alerts out 61 seconds later
2026-07-24 · Anthropic's Claude Opus 5 went live on the public API today. Our checkers saw the id appear at 16:51:33 UTC, confirmed it on the next 60-second sweep, and the alert blast went out at 16:52:34 — sixty-one seconds from first sighting to inbox.
GPT-6 Astra vs Claude Opus 5: quick answers
Which is better, GPT-6 Astra or Claude Opus 5?
It depends on what you measure. Of the 6 public leaderboards that rate both, GPT-6 Astra scores higher on 5 and Claude Opus 5 on 1. GPT-6 Astra's widest lead is on LiveBench; Claude Opus 5's widest lead is on Vals AI. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, GPT-6 Astra is at 89.2 and Claude Opus 5 at 84.8 (out of 100).
Which is newer, GPT-6 Astra or Claude Opus 5?
GPT-6 Astra. It went live on September 3, 2026, 41 days after Claude Opus 5 (July 24, 2026).
Who makes GPT-6 Astra and Claude Opus 5?
GPT-6 Astra is from OpenAI; Claude Opus 5 is from Anthropic.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed September 24, 2026). Boards measure different things, so raw scores are only comparable within a row.
More comparisons
Watch free: Chrome push the moment a new model answers on a public API, an email about 15 minutes later. Also: the bench index · the wire