o1

In one line

o1 by OpenAI, measured by Artificial Analysis at 15.2 on the Intelligence Index, 39.7 on coding. Added to WhichAI automatically from live data on October 13, 2026: no editorial review yet, so judge it by the numbers, not by a verdict. OpenRouter's description: “The latest and strongest model family from OpenAI, o1 is designed to spend more time thinking before responding.”

Alternatives worth a look

• GLM 4.7 Flash (Z.ai) · AA 14.9API $0.061/$0.4 per 1M tokens on OpenRouter · open weights · listed January 19, 2026
• DeepSeek V3.1 Terminus (DeepSeek) · AA 14.8API $0.27/$1 per 1M tokens on OpenRouter · open weights · listed September 22, 2025
• Gemma 4 31B (Google) · AA 14.7Open weights · runs on consumer hardware

Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 13, 2026. 210 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).