Updated daily at 05:00 UTC
- Released
- 5 Aug 2026
- Status
- Legacy
- Context
- 1M
- Max output
- —
- Input per 1M tokens
- $1.25
- Output per 1M tokens
- $4.25
- Open weights
- No
- License
- proprietary
- Parameters
- —
- Knowledge cutoff
- —
- Reasoning
- Yes
- Modalities
- text, image, video, audio, pdf → 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 | 63.1 | 4 | 2 of 4 |
| Coding & software engineering | 54.9 | Not ranked | 1 of 5 |
| Factuality & hallucination | 60.3 | 13 | 1 of 1 |
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) | 94.7% | Third party | xhigh | — | https://conceptualreasoning.ai/dtbench via Epoch AI |
| LMCA (Language Model Conceptual Argumentation) | Correlation with expert ratings (Pearson r) | 0.4835 | Third party | xhigh | — | https://conceptualreasoning.ai/lmca via Epoch AI |
| SimpleBench | Score (AVG@5) | 74.5% | Third party | — | — | https://lmcouncil.ai/benchmarks via Epoch AI |
Coding & software engineering
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| DeepSWE | Pass@1 | 54.9% | Third party | xhigh | — | https://deepswe.datacurve.ai/ via Epoch AI |
| WeirdML (v2) | Average accuracy | 60.3% | Third party | xhigh | — | https://htihle.github.io/weirdml.html via Epoch AI |
Professional knowledge work
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| APEX-Agents | Pass@1 (all rubric criteria met) | 36.4% | Source not stated | — | — | Epoch AI via Epoch AI |
Factuality & hallucination
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| SimpleQA Verified | Accuracy (% correct) | 60.3% | Independent | xhigh | 27 Aug 2026 | Epoch AI |
Other Muse Spark versions
- Muse Spark 1.32 Sep 2026
- Muse Spark 1.18 Apr 2026