# TaxEval v2 — AI model rankings

A set of real tax questions created by Vals AI — can the AI give accurate answers about tax rules and filings? Higher is better.

4 tracked models have a published TaxEval v2 score. Higher is better. Scores come from published lab reports and benchmark sources; recorded sources appear beside the scores.

## Ranking

| Rank | Model | Developer | Score | Source | Released |
| --- | --- | --- | --- | --- | --- |
| 1 | Muse Spark 1.1 | Meta | 79.72% | Lab | Jul 9 2026 |
| 2 | Claude Fable 5 | Anthropic | 76.94% | Lab | Jun 9 2026 |
| 3 | Claude Opus 4.8 | Anthropic | 75.63% | Lab | May 28 2026 |
| 4 | GPT-5.5 | OpenAI | 74.98% | Lab | Apr 23 2026 |


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Canonical page: https://aireleasetracker.com/benchmark/taxeval-v2
Site index: https://aireleasetracker.com/llms.txt
Source: AI Release Tracker (https://aireleasetracker.com). Most benchmark scores come from lab launch material; gathered results identify the leaderboard that published them.