MODEL PROOF
GPT-5.4 Nano
BETTER VALUE OPTION
A stored alternative has an equal-or-higher measured score and an equal-or-lower price.
GPT-5.6 Luna · Δ score 57 points · 3% lower measured price · $0.450 / 1M tokens
GLM 5.3 Flash is a further stored option with these losses: no file input
- Independent LMArena score
- 1,372.9 ± 3.85 · 58,424 votes
- Context window
- 400K
- Maximum output
- 128K
- Input modalities
- file, image, text
- Output modalities
- text
- Published input price
- $0.200 / 1M tokens
- Published output price
- $1.25 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Every price dimension · USD per million tokens
| Input | $0.200/M |
|---|---|
| Output | $1.25/M |
| Cached input | $0.020/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
| $0.100 | $0.625 | undeclared | 100.00% |
| Azureazure Endpoint terms
| $0.200 | $1.25 | undeclared | 99.98% |
| OpenAIopenai Endpoint terms
| $0.200 | $1.25 | undeclared | 99.99% |
| Azureazure/us Endpoint terms
| $0.220 | $1.38 | undeclared | — |
Independent scores
| LMArena Elo | 1372.9high |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Capability
| Context window | 400K |
|---|---|
| Max output | 128K |
| Input modes | file, image, text |
| Tool use | yes |
| Reasoning | optional |
| Knowledge cutoff | 2025-08-31 |
| Open weights | no |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-09-23 |
| Quality data | verified |
| Cross-checked | vendor page |
GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...
Questions this page answers
What does GPT-5.4 Nano cost?
$0.200/M in, $1.25/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does GPT-5.4 Nano have an independent quality score?
GPT-5.4 Nano has an LMArena score in this catalogue.
What beats GPT-5.4 Nano?
GPT-5.6 Luna has an equal-or-higher measured score and an equal-or-lower price.
Does this page use Artificial Analysis scores for GPT-5.4 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
Save or share this proof
Badge
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-5.4-nano/)<a href="https://undominated.ai/models/openai__gpt-5.4-nano/"><img src="https://undominated.ai/badge/openai__gpt-5.4-nano.svg" alt="GPT-5.4 Nano — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/openai__gpt-5.4-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.
