Updated daily at 05:00 UTC
- Released
- 22 Sep 2026
- Status
- Current
- Context
- 1M
- Max output
- 128K
- Input per 1M tokens
- $4.00
- Output per 1M tokens
- $20.00
- Open weights
- No
- License
- proprietary
- Parameters
- —
- Knowledge cutoff
- Jun 2026
- Reasoning
- Yes
- Modalities
- text, image → text
Category scores
Out of 100, from independent and third-party results only, by method category-2026-09-29.1.
| Category | Score | Rank | Coverage |
|---|---|---|---|
| Knowledge & reasoning | 75.8 | 1 | 2 of 4 |
| Coding & software engineering | 77.4 | Not ranked | 1 of 5 |
| Vision & multimodal understanding | 76.2 | Not ranked | 1 of 3 |
| Factuality & hallucination | 72.2 | 3 | 1 of 1 |
| Human preference | 78.6 | Not ranked | 2 of 5 |
Benchmark results
Every result we hold for this model, with who ran it and where it was published.
Knowledge & reasoning
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| DTBench (Decision Theory Benchmark) | Accuracy (capability questions) | 98.9% | Third party | max | — | https://conceptualreasoning.ai/dtbench via Epoch AI |
| Earthborne Rangers (EBR-bench) | Objectives reached | 71.4% | Independent | max | 22 Sep 2026 | Epoch AI |
| LMCA (Language Model Conceptual Argumentation) | Correlation with expert ratings (Pearson r) | 0.6823 | Third party | max | — | https://conceptualreasoning.ai/lmca via Epoch AI |
Scientific reasoning
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| GPQA Diamond | Accuracy | 90.6% | Independent | max | 22 Sep 2026 | Epoch AI |
Mathematics
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| FrontierMath Tier 4 | Accuracy | 95.0% | Independent | max | 22 Sep 2026 | Epoch AI |
| FrontierMath Tiers 1-3 | Accuracy | 91.2% | Independent | max | 22 Sep 2026 | Epoch AI |
| OTIS Mock AIME 2024-2025 | Accuracy | 100.0% | Independent | max | 22 Sep 2026 | Epoch AI |
Coding & software engineering
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| MirrorCode | Score | 77.4% | Independent | max | 22 Sep 2026 | Epoch AI |
Professional knowledge work
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| APEX-Agents | Pass@1 (all rubric criteria met) | 73.5% | Source not stated | max | — | Epoch AI via Epoch AI |
Vision & multimodal understanding
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| Furniture Assembly | Score | 83.3% | Independent | max | 22 Sep 2026 | Epoch AI |
Factuality & hallucination
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| SimpleQA Verified | Accuracy (% correct) | 72.2% | Independent | max | 22 Sep 2026 | Epoch AI |
Human preference
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| Code Arena: WebDev (arena.ai) | Arena score (Elo scale) | 1827 | Independent | max | 25 Sep 2026 | Arena |
| Code Arena: WebDev (arena.ai) | Votes | 1607 | Independent | max | 25 Sep 2026 | Arena |
| Text Arena (arena.ai) | Arena score (Elo scale) | 1509 | Independent | high | 25 Sep 2026 | Arena |
| Text Arena (arena.ai) | Votes | 2307 | Independent | high | 25 Sep 2026 | Arena |
Other Claude Opus versions
- Claude Opus 524 Jul 2026
- Claude Opus 4.828 May 2026
- Claude Opus 4.716 Apr 2026
- Claude Opus 4.65 Feb 2026
- Claude Opus 4.524 Nov 2025
- Claude Opus 4.15 Aug 2025
- Claude Opus 422 May 2025
- Claude 3 Opus4 Mar 2024