# Anthropic Organic Chemistry V2 evaluation (Organic chemistry V2)

> Chemistry tasks covering spectroscopy, synthesis planning, reaction prediction, and chemical structure images.

Canonical page: https://benchlm.ai/benchmarks/organicchemistryv2

- Category: [Knowledge](/knowledge)
- Last updated: September 27, 2026

## About Organic chemistry V2

- Year: 2026
- Tasks: Organic chemistry reasoning tasks
- Format: Task score
- Difficulty: Expert organic chemistry
- Paper: [Claude Opus 5 System Card](https://www-cdn.anthropic.com/c5fbac3f0b1280a933ebd26d3cb8bb9f5bdeaf48/Claude%20Opus%205%20System%20Card.pdf)

Section 8.17.5 reports the updated internal evaluation. Ten of 1,260 Opus 5 attempts timed out and were excluded from aggregation.

Organic chemistry V2 is currently displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.

## Leaderboard (1 models)

| Rank | Model | Creator | Score |
|------|-------|---------|-------|
| 1 | [Claude Opus 5](/models/claude-opus-5) | Anthropic | 61.6% |

## FAQ

### What does Organic chemistry V2 measure?

Chemistry tasks covering spectroscopy, synthesis planning, reaction prediction, and chemical structure images.

### Which model scores highest on Organic chemistry V2?

Claude Opus 5 by Anthropic currently leads with a score of 61.6% on Organic chemistry V2.

### How many models are evaluated on Organic chemistry V2?

1 AI models have been evaluated on Organic chemistry V2 on BenchLM.

### Does Organic chemistry V2 affect BenchLM's overall score?

Not directly. Organic chemistry V2 is still displayed on BenchLM for reference, but it is excluded from the weighted scoring formula.