GPT 4.5 Preview
OpenAI
Key facts · verified Oct 29, 2026
GPT 4.5 Preview is an OpenAI model. It was retired on 14 July 2025. Its last listed API price was $75 per million input tokens and $150 per million output tokens. Its context window is 128K tokens. It ranks #89 on LMArena's text leaderboard (Elo 1445, read 1 Nov 2026). Source: developers.openai.com.
GPT 4.5 Preview (gpt-4.5-preview) was a research preview of GPT-4.5 from OpenAI with a 128K-token context window. It was available via the API until OpenAI shut it down on 14 July 2025, recommending gpt-4.1 or o3 instead. It was priced at $75 per million input tokens and $150 per million output tokens. 1445 Elo (rank 89)
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1445 Elo (rank 89) · source · retrieved Nov 1, 2026
Full Specifications
$75 / $150 per million tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Retired | 14 July 2025 |
| Status | Retired. OpenAI shut down gpt-4.5-preview on 14 July 2025 and recommends gpt-4.1 or o3. |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $93.750 / 1M tokens |
| Input price | $75.000 / 1M tokens |
| Output price | $150.000 / 1M tokens |
| Capacity | |
| Context window | 128K tokens |
| Measured quality | |
| LMArena Elo | 1445 (checked Nov 2026) |
| LMArena rank | Rank 89 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 15 |