Cheaper overall
GPT-5.4 Nano
73% lower blended rate
Higher benchmark scores
GPT-5.4 Mini
leads on 10 of 13 figures
Cheaper cached input
GPT-5.4 Nano
$0.02 vs $0.075, 73% less
Where each one wins
GPT-5.4 Mini
- Higher overall intelligence (Intelligence Index) 24.1 vs 20.7
- Higher multi-step tool use (Agentic Index) 17.9 vs 16
- Higher graduate-level science (GPQA Diamond) 87.5 vs 81.7
- Ahead on 7 more benchmark figures
GPT-5.4 Nano
- Cheaper input tokens $0.20 vs $0.75, 73% less
- Cheaper output tokens $1.25 vs $4.50, 72% less
- Cheaper cached input $0.02 vs $0.075, 73% less
- Cheaper on all four workloads
- Higher expert-exam performance (Humanity's Last Exam) 28.3 vs 28.1
- Higher instruction following (IFBench) 75.9 vs 73.3
- Higher answer reliability (Omniscience Non-Hallucination) 48.9 vs 10.2
What four workloads cost
One run, and the same run a thousand times.
GPT-5.4 Nano is cheaper on all four workloads, by much the same margin each time โ about 3.7 times, from $0.0008 against $0.0030 on a chat turn to $0.0838 against $0.3135 on a long document.
| Workload | GPT-5.4 Mini | GPT-5.4 Nano | ร1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0030 | $0.0008 | $3.00 / $0.8250 | GPT-5.4 Nano is 73% cheaper |
| RAG answer 10,000 in / 800 out | $0.0111 | $0.0030 | $11.10 / $3.00 | GPT-5.4 Nano is 73% cheaper |
| Agent loop 32,000 in / 700 out ร 20 calls | $0.1380 | $0.0375 | $138.00 / $37.50 | GPT-5.4 Nano is 73% cheaper |
| Long document 400,000 in / 3,000 out | $0.3135 | $0.0838 | $313.50 / $83.75 | GPT-5.4 Nano is 73% cheaper |
Price per 1M tokens
Above 272,000 input tokens the rates change, and the new rate applies to the whole request, not just the tokens past that point. It does not change which of the two is cheaper.
| Context band | Price | GPT-5.4 Mini | GPT-5.4 Nano | Difference |
|---|---|---|---|---|
| Prompts up to 272,000 tokens | Input | $0.75 | $0.20 | GPT-5.4 Nano is 73% cheaper |
| Prompts up to 272,000 tokens | Cached input | $0.075 | $0.02 | GPT-5.4 Nano is 73% cheaper |
| Prompts up to 272,000 tokens | Output | $4.50 | $1.25 | GPT-5.4 Nano is 72% cheaper |
| Prompts over 272,000 tokens | Input | $0.75 | $0.20 | GPT-5.4 Nano is 73% cheaper |
| Prompts over 272,000 tokens | Cached input | $0.075 | $0.02 | GPT-5.4 Nano is 73% cheaper |
| Prompts over 272,000 tokens | Output | $4.50 | $1.25 | GPT-5.4 Nano is 72% cheaper |
Blended: GPT-5.4 Mini $1.6875, GPT-5.4 Nano $0.4625 per 1M โ one rate at 3:1 input to output, for comparing two models at a glance.
Both priced by OpenAI. Standard tier, pay-as-you-go.
Other pricing tiers
Both models offer Batch and Flex, worth up to 50% off their standard rates, and the cheaper model is the same one on every tier โ so the tier you buy changes the bill rather than the choice.
Every tier either model sells is here, so this is the whole price sheet. A saving is measured against that model's own standard rate โ how we read tiers.
| Tier | GPT-5.4 Mini | GPT-5.4 Nano | Cheaper |
|---|---|---|---|
| Batch | $0.375 in / $2.25 out 50% off Standard | $0.10 in / $0.625 out 50% off Standard | GPT-5.4 Nano |
| Flex | $0.375 in / $2.25 out 50% off Standard | $0.10 in / $0.625 out 50% off Standard | GPT-5.4 Nano |
Benchmarks
They share 14 figures: GPT-5.4 Mini leads on 10, GPT-5.4 Nano on 3. The widest gap is 38.7 points, on answer reliability (Omniscience Non-Hallucination).
Overall intelligence
Intelligence Index โ Overall intelligence across reasoning, knowledge & math evals
GPT-5.4 Mini ahead by 3.4
Coding ability
Coding Index โ Coding ability across software-engineering evals
Level
Multi-step tool use
Agentic Index โ Tool use & multi-step agent task performance
GPT-5.4 Mini ahead by 1.9
Graduate-level science
GPQA Diamond โ Graduate-level questions in biology, chemistry & physics
GPT-5.4 Mini ahead by 5.8
Expert-exam performance
Humanity's Last Exam โ Expert-level questions across many academic domains
GPT-5.4 Nano ahead by 0.2
Instruction following
IFBench โ Precise following of detailed instructions
GPT-5.4 Nano ahead by 2.6
Support-agent performance
ฯยฒ-Bench Telecom โ Tool-using agent tasks in a telecom support setting
GPT-5.4 Mini ahead by 7.3
Long-context reasoning
AA-LCR โ Long-context reasoning across large inputs
GPT-5.4 Mini ahead by 0.3
Scientific coding
SciCode โ Research-level scientific coding tasks
GPT-5.4 Mini ahead by 4.9
Command-line work
Terminal-Bench Hard โ Complex command-line and terminal workflows
GPT-5.4 Mini ahead by 9.9
Physics research reasoning
CritPt โ Unpublished physics research reasoning problems
GPT-5.4 Mini ahead by 0.7
Real-world task performance
GDPval โ Economically valuable, real-world knowledge work
GPT-5.4 Mini ahead by 3.2
Factual accuracy
Omniscience Accuracy โ Breadth of factual knowledge across domains
GPT-5.4 Mini ahead by 11.8
Answer reliability
Omniscience Non-Hallucination โ How reliably the model avoids fabricated answers
GPT-5.4 Nano ahead by 38.7
Each figure is that model's best published run, with the effort level named beside it โ where these scores come from.
Specifications
| Specification | GPT-5.4 Mini | GPT-5.4 Nano |
|---|---|---|
| Context window | 400,000 tokens | 400,000 tokens |
| Max output | 128,000 tokens | 128,000 tokens |
| Takes in | Text, image, file | Text, image, file |
| Puts out | Text | Text |
| Knowledge cutoff | 31 Aug 2025 | 31 Aug 2025 |
| Released | 17 Mar 2026 | 17 Mar 2026 |
| Status | Active | Active |
| Sold by | OpenAI, Perplexity | OpenAI, Perplexity |
FAQs
- Is GPT-5.4 Mini cheaper than GPT-5.4 Nano?
- No โ the other way round. A 1,000-token prompt with a 500-token reply costs $0.0030 on GPT-5.4 Mini and $0.0008 on GPT-5.4 Nano, and the same model is cheaper on every workload on this page.
- How much do GPT-5.4 Mini and GPT-5.4 Nano cost per 1M tokens?
- GPT-5.4 Mini costs $0.75 for input and $4.50 for output. GPT-5.4 Nano costs $0.20 and $1.25. Standard pay-as-you-go rates.
- Which is better, GPT-5.4 Mini or GPT-5.4 Nano?
- On published benchmarks, GPT-5.4 Mini. It leads on 10 of the 14 figures both models report, including overall intelligence (Intelligence Index), where it scores 24.1 against 20.7.
- Is Batch pricing cheaper for GPT-5.4 Mini or GPT-5.4 Nano?
- Batch input costs $0.375 on GPT-5.4 Mini and $0.10 on GPT-5.4 Nano, 50% below the standard rate on both.