Who ranks #1 on the Mask leaderboard?
As of August 20, 2026, Grok-4.1 Thinking by xAI ranks #1 on Mask at 51%. API pricing is $3.00/M input and $15.00/M output.
As of August 20, 2026, Grok-4.1 Thinking is #1 for Mask at 51%. Ranked by the Mask score 1 models in this index have a published Mask score. Mask leaderboard: rank models by Mask next to live API token prices.
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The index
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As of August 20, 2026, Grok-4.1 Thinking by xAI is #1 for Mask at 51%. Ranked by the Mask score This board also tracks Mask. This mask leaderboard ranks models by Mask. Scores come from public evals. Prices are the live API rates in the table above.
Sources: OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Anthropic Claude API pricing (https://platform.claude.com/docs/en/about-claude/pricing); Gemini API pricing (https://ai.google.dev/gemini-api/docs/pricing)
| Rank | Model | Mask | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Grok-4.1 Thinking | 51% | $3.00 | $15.00 |
Rank one eval at a time. All LLM benchmarks.
As of August 20, 2026, Grok-4.1 Thinking by xAI ranks #1 on Mask at 51%. API pricing is $3.00/M input and $15.00/M output.
Grok-4.1 Thinking currently leads Mask and is also the cheapest scored model on this page, at $3.00/M input and $15.00/M output ($18.00 blended).
Not automatically. Grok-4.1 Thinking leads Mask, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh Mask against input/output price, context window, and related evals.
Scores and API prices on this page are refreshed from published evals and provider rates. The snapshot is labeled August 20, 2026. Treat it as a current index, not a one-off blog post.
Mask is a public LLM eval (the Mask score). This page ranks models that have published a score, next to live API prices.
This page is the Mask leaderboard. Models are sorted by Mask, with input and output token prices on the same row so you can weigh score against cost. Official boards often omit price; that comparison is the point of this index.
Official eval pages own the methodology. This page keeps the published Mask score next to live API $/M so you can pick a production SKU, not only a trophy number.