ts-bench v1
Coding agents solve 25 self-contained TypeScript exercises from Exercism. The score is the percentage of exercises that pass their tests.
Version 1 is frozen at the v1-final tag. Version 2 uses five SWE-Lancer tasks.
- Made by
- laiso (independent)
- Released
- June 2025
- Kind
- Function-level problems
- Level
- University
- Scored
- Checked automatically
- Answers
- Agent task
- Tasks
- All public
- Strongest model tested
- GPT-5.2 #50 on the capability index
- Last model added
- February 2026
- Scores refreshed
- November 12th, 2026
4 models share the top score of 96% among models released by February 2026
Best score per model from the benchmark's own leaderboard, read on November 12th, 2026. Where a model ran with several settings or harnesses, we keep its best.
The newest model with a score here came out in February 2026, and nobody has tested a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- Claude Fable 5.2
-
Gemini 4 Carbon - GPT-6 Astra
- Claude Opus 5.5
- and 16 more
- 1 GPT-5 96%
- 2 Gemini 3 Pro 96%
- 3 Kimi K2.5 96%
- 4 GPT-5.3 Codex 96%
- 5 Claude Sonnet 4 92%
- 6 GLM-4.6 92%
- 7 GPT-5.2 92%
- 8 Gemini 3 Flash 92%
- 9
Qwen3-Coder-Next 92%
Source: Official ts-bench v1 leaderboard
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | GPT-5 | 96% | opencode | Aug 2025 | Official leaderboard |
| 2 | Gemini 3 Pro | 96% | gemini | Nov 2025 | Official leaderboard |
| 3 | Kimi K2.5 | 96% | kimi | Jan 2026 | Official leaderboard |
| 4 | GPT-5.3 Codex | 96% | codex | Feb 2026 | Official leaderboard |
| 5 | Claude Sonnet 4 | 92% | goose | May 2025 | Official leaderboard |
| 6 | GLM-4.6 | 92% | claude | Sep 2025 | Official leaderboard |
| 7 | GPT-5.2 | 92% | codex | Dec 2025 | Official leaderboard |
| 8 | Gemini 3 Flash | 92% | gemini | Dec 2025 | Official leaderboard |
| 9 | Qwen3-Coder-Next | 92% | qwen | Feb 2026 | Official leaderboard |
2 models have held number one on the official leaderboard since its release in June 2025
Lab claims count from the day the card came out, independent runs from the model’s release.
Source: Official ts-bench v1 leaderboard
Claude Sonnet 4 on the official leaderboard passed 85% in May 2025
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Official ts-bench v1 leaderboard
No lab model card reports it yet
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark.
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