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Step 5 Preview
GPT-4.5 Preview
GPT-4.5 Preview is a proprietary model from OpenAI. It ranks #125 of 351 on the LMArena text leaderboard with a rating of 1417.
- Developer
- OpenAI
- Released
- Mar 3, 2025
- Context window
- —
- Price in / out, per 1M tokens
- —
- Weights
- Proprietary
- Inputs
- —
- Reasoning
- —
- Tool use
- —
The rating LMArena published at each update since Mar 3, 2025. Ratings move as votes come in and new models join.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1417 | 125 / 351 | 14.5K |
| CodingLMArena | 1396 | 180 / 346 | 1.9K |
| MathLMArena | 1412 | 142 / 339 | 1.4K |
| Creative writingLMArena | 1394 | 110 / 349 | 2.6K |
| Instruction followingLMArena | 1404 | 122 / 351 | 5.5K |
| Hard promptsLMArena | 1403 | 162 / 351 | 3.4K |
| Multi-turnLMArena | 1444 | 80 / 349 | 2.1K |
| Long queriesLMArena | 1406 | 140 / 330 | 1.8K |
| ExpertLMArena | 1394 | 168 / 305 | 608 |
| Legal and governmentIndustries | 1434 | 103 / 325 | 701 |
| Medicine and healthcareIndustries | 1411 | 147 / 325 | 589 |
| Business and financeIndustries | 1386 | 163 / 344 | 1.4K |
| ChineseLanguages | 1421 | 166 / 328 | 907 |
| GermanLanguages | 1457 | 44 / 261 | 319 |
| FrenchLanguages | 1418 | 136 / 252 | 121 |
| JapaneseLanguages | 1416 | 58 / 236 | 271 |
| VisionLMArena | 1195 | 97 / 146 | 2.9K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare GPT-4.5 Preview
OpenAI
The lab behind GPT and ChatGPT, which brought large language models to hundreds of millions of people. Founded 2015, based in San Francisco. openai.com
Questions
Who makes GPT-4.5 Preview?
GPT-4.5 Preview is made by OpenAI, founded 2015 and based in San Francisco.
How does GPT-4.5 Preview rank?
#125 of 351 on LMArena’s text leaderboard, rated 1417 (95% interval 1412–1423) from 14,547 votes, as of Oct 22, 2026.
Is GPT-4.5 Preview open source?
No. GPT-4.5 Preview is proprietary and served through its provider’s API.