AI model comparison
GPT-5.4 Nano vs GPT-5.1-Codex-Mini
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
OpenAI
GPT-5.4 Nano
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.
- Input / 1M
- $0.20
- Output / 1M
- $1.25
- Context
- 400K
OpenAI
GPT-5.1-Codex-Mini
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
- Input / 1M
- $0.25
- Output / 1M
- $2
- Context
- 400K
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GPT-5.4 Nano
1.5x cheaper for a typical chat
Higher intelligence score
GPT-5.4 Nano
20.7 vs 20.4 on Artificial Analysis
Larger context window
Tie
400K vs 400K tokens
Newer release
GPT-5.4 Nano
Released March 17, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
GPT-5.4 Nano20.7GPT-5.1-Codex-Mini20.4Coding index
GPT-5.4 Nano56.1GPT-5.1-Codex-MiniNot availableAgentic index
GPT-5.4 Nano16GPT-5.1-Codex-MiniNot availablePricing
GPT-5.4 Nano vs GPT-5.1-Codex-Mini API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | GPT-5.4 Nano | GPT-5.1-Codex-Mini |
|---|---|---|
| Input tokensPer 1M tokens | $0.20 | $0.25 |
| Output tokensPer 1M tokens | $1.25 | $2 |
| Cached input (read)Per 1M tokens | $0.02 | $0.03 |
| Cache writePer 1M tokens | Not available | Not available |
| Web searchPer request | $0.01 | $0.01 |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
GPT-5.4 Nano$1.02GPT-5.1-Codex-Mini$1.50Coding task
30K in, 4K out
GPT-5.4 Nano$11$5.60 cachedGPT-5.1-Codex-Mini$15.50$8.90 cachedLong document summary
150K in, 2K out
GPT-5.4 Nano$32.50$5.50 cachedGPT-5.1-Codex-Mini$41.50$8.50 cachedSpecs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | GPT-5.4 Nano | GPT-5.1-Codex-Mini |
|---|---|---|
| Context window | 400K tokens | 400K tokens |
| Max output | 128K tokens | 128K tokens |
| Input types | File, Image, Text | Image, Text |
| Output types | Text | Text |
| Reasoning effort levels | Extra high, High, Medium, Low, None | High, Medium, Low |
| Default reasoning effort | Medium | Medium |
| Release date | March 17, 2026 | November 13, 2025 |
Features
Supported features
API features available for each model.
| Metric | GPT-5.4 Nano | GPT-5.1-Codex-Mini |
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Not supported | Not supported |
| Stop sequences | Not supported | Not supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Supported | Supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
GPT-5.4 NanoView full model details- GPT-5.4 Nano vs DeepSeek V4 Flash 0423
- GPT-5.4 Nano vs DeepSeek V3.2
- GPT-5.4 Nano vs Gemini 3.5 Flash Lite
- GPT-5.4 Nano vs Step 3.7 Flash
- GPT-5.4 Nano vs GPT-5 Mini
- GPT-5.4 Nano vs GPT-5.6 Luna Pro
- GPT-5.4 Nano vs Qwen3.6 35B A3B
- GPT-5.4 Nano vs MiniMax M2.7
- GPT-5.4 Nano vs MiniMax M2.5
- GPT-5.4 Nano vs MiniMax M2.1
- GPT-5.4 Nano vs o3
- GPT-5.4 Nano vs Qwen3.5-35B-A3B
- GPT-5.4 Nano vs LongCat 2.0
- GPT-5.4 Nano vs MiniMax M2
- GPT-5.4 Nano vs Muse Glimmer 30B
GPT-5.1-Codex-MiniView full model details- GPT-5.1-Codex-Mini vs DeepSeek V4 Flash 0423
- GPT-5.1-Codex-Mini vs GPT-5.4 Mini
- GPT-5.1-Codex-Mini vs Nemotron 3 Ultra
- GPT-5.1-Codex-Mini vs Gemini 3.5 Flash Lite
- GPT-5.1-Codex-Mini vs GLM 4.7
- GPT-5.1-Codex-Mini vs Qwen3.5 397B A17B
- GPT-5.1-Codex-Mini vs GPT-5 Mini
- GPT-5.1-Codex-Mini vs o3
- GPT-5.1-Codex-Mini vs Step 3.7 Flash
- GPT-5.1-Codex-Mini vs GLM 4.6
Our take
GPT-5.4 Nano is 1.5x cheaper for a typical chat. GPT-5.4 Nano scores higher on the Artificial Analysis Intelligence Index (20.7 vs 20.4). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GPT-5.4 Nano or GPT-5.1-Codex-Mini cheaper?
GPT-5.4 Nano is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-5.4 Nano costs $0.20 per 1M input tokens and $1.25 per 1M output tokens, while GPT-5.1-Codex-Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens.
Which has a bigger context window, GPT-5.4 Nano or GPT-5.1-Codex-Mini?
GPT-5.4 Nano supports up to 400K tokens of context, compared with 400K for GPT-5.1-Codex-Mini.
Is GPT-5.4 Nano smarter than GPT-5.1-Codex-Mini?
On the Artificial Analysis Intelligence Index, GPT-5.4 Nano scores 20.7 and GPT-5.1-Codex-Mini scores 20.4, putting GPT-5.4 Nano ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GPT-5.4 Nano and GPT-5.1-Codex-Mini at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-5.4 Nano and GPT-5.1-Codex-Mini answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GPT-5.4 Nano and GPT-5.1-Codex-Mini at the same time. Compare the answers side by side and keep the best one.