MODEL PROOF
GPT-5 Nano
TRADE-OFF
A stored alternative has an equal-or-higher score and an equal-or-lower price, with capability losses.
Gemma 4 26B A4B · Δ score 113.9 points · 8% lower measured price
- 400K → 262K context
- no file input
- Independent LMArena score
- 1,320 ± 6.86 · 8,112 votes
- Context window
- 400K
- Maximum output
- 128K
- Input modalities
- text, image, file
- Output modalities
- text
- Published input price
- $0.050 / 1M tokens
- Published output price
- $0.400 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from OpenAI: the cheapest offer that is serving, at standard delivery and at the maker’s precision or better, at its standard rate.
Cheaper right now: $0.069/M at OpenAI — delivery tier (flex) It does not pass the like-for-like test, so it never sets a rank.
Every price dimension · USD per million tokens
| Input | $0.050/M |
|---|---|
| Output | $0.400/M |
| Cached input | $0.0050/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
| Web search | $0.01/call |
| Batch discount | 50% |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
4 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| OpenAIopenai/flex Endpoint terms
| $0.025 | $0.200 | undeclared | 100.00% |
| Azureazure Endpoint terms
| $0.050 | $0.400 | undeclared | 99.67% |
| OpenAIopenai Endpoint terms
| $0.050 | $0.400 | undeclared | 99.96% |
| Azureazure/swedencentral Endpoint terms
| $0.055 | $0.440 | undeclared | 100.00% |
Independent scores
| LMArena Elo | 1320high |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- Code categories #96 1088
- UI components #96 1073
- Websites #97 1108
- Game development #100 1057
- Data visualisation #101 1064
- 3D #108 973
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
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 | 2026-10-06 |
| Quality data | verified |
| Cross-checked | vendor page |
People search GPT-5 Nano, GPT 5 nano, and GPT 5.0 nano. This is the GPT-5 Nano API row, not GPT-5 and not a ChatGPT plan.
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...
Questions this page answers
What does GPT-5 Nano cost?
$0.050/M in, $0.400/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does GPT-5 Nano have an independent quality score?
GPT-5 Nano has an LMArena score in this catalogue.
What beats GPT-5 Nano?
Gemma 4 26B A4B has an equal-or-higher measured score and an equal-or-lower price, with capability trade-offs.
Does this page use Artificial Analysis scores for GPT-5 Nano?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
MODEL MONUMENT
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The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/openai__gpt-5-nano/)<a href="https://undominated.ai/models/openai__gpt-5-nano/"><img src="https://undominated.ai/badge/openai__gpt-5-nano.svg" alt="GPT-5 Nano — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/openai__gpt-5-nano.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
older than the last deploy.
