---
title: "OpenAI: GPT-5 Nano — price, capability and what beats it · Undominated.ai"
canonical: https://undominated.ai/models/openai__gpt-5-nano/
description: "OpenAI: GPT-5 Nano: $0.050/M in, $0.400/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper."
---

# OpenAI: GPT-5 Nano — price, capability and what beats it · Undominated.ai

> OpenAI: GPT-5 Nano: $0.050/M in, $0.400/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper.

[Leaderboard](/) / OpenAI

# GPT-5 Nano

OpenAI · released 2025-08-07 · proprietary

 $0.138 per million tokens, balanced Balanced Summarise Chat Code gen Agentic

## No independent quality score.

No benchmark we track has measured this model. That is not the same as measuring it and finding it wanting — we simply cannot rank it, so we do not.

### Every price dimension

| Input | $0.050 /M |
| --- | --- |
| Output | $0.400 /M |
| Cached input | $0.0050 /M |
| Web search | $0.01 /call |
| Batch discount | 50% |

### Independent scores

| LMArena Elo | 1320.3 high |
| --- | --- |

Sources are listed separately rather than averaged. Across the 62 models both have scored they correlate at r = 0.806 — close agreement overall, but four models rank very differently between them, and a blended score would hide exactly those.

### Capability

| Context window | 400K |
| --- | --- |
| Max output | 128K |
| Input modes | text, image, file |
| Tool use | yes |
| Reasoning | always on |
| Knowledge cutoff | 2024-05-31 |
| Open weights | no |

### Provenance

| Price source | openrouter.ai |
| --- | --- |
| Fetched | 2026-08-24 |
| Quality data | unrated |
| Cross-checked | vendor page |

GPT-5-Nano is the smallest and fastest variant in the GPT-5 system, optimized for developer tools, rapid interactions, and ultra-low latency environments. While limited in reasoning depth compared to its larger...