GPT 5 Nano High
Key facts · verified Oct 29, 2026
GPT 5 Nano High is an OpenAI model. Status: Deprecated - shutting down 11 December 2026; replacement: gpt-5.6-luna. Its API price is $0.05 per million input tokens and $0.40 per million output tokens. Its context window is 400K tokens. It ranks #239 on LMArena's text leaderboard (Elo 1338, read 1 Nov 2026). Source: developers.openai.com.
GPT 5 Nano High is OpenAI's GPT-5 nano model run at high reasoning effort. OpenAI lists API pricing of $0.05 per million input tokens and $0.40 per million output tokens, with a 400K-token context window. OpenAI's deprecations page lists the gpt-5-nano-2025-08-07 snapshot for shutdown on 11 December 2026, with gpt-5.6-luna as the replacement. On LMArena's text leaderboard it has 1338 Elo (rank 239, high effort).
Full Specifications
$0.05 / $0.40 per million tokens | |
|---|---|
| Identity | |
| Developer | OpenAI |
| Status | Deprecated - shutting down 11 December 2026; replacement: gpt-5.6-luna |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $0.138 / 1M tokens |
| Input price | $0.050 / 1M tokens |
| Output price | $0.400 / 1M tokens |
| Capacity | |
| Context window | 400K tokens |
| Measured quality | |
| LMArena Elo | 1338 (checked Nov 2026) |
| LMArena rank | Rank 239 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 9731 |