Cheaper overall
GPT-5.4 Mini
98% lower blended rate
Higher benchmark scores
GPT-5.4 Pro
leads on 1 of 1 figures
Bigger context window
GPT-5.4 Pro
1,050,000 vs 400,000 tokens
Where each one wins
GPT-5.4 Mini
- Cheaper input tokens $0.75 vs $30.00, 98% less
- Cheaper output tokens $4.50 vs $180.00, 98% less
- Cheaper on all four workloads
GPT-5.4 Pro
- Larger context window 1,050,000 tokens
- Higher physics research reasoning (CritPt) 30 vs 10
What four workloads cost
One run, and the same run a thousand times.
The gap opens on long prompts: GPT-5.4 Mini costs $0.3135 against $24.81, a difference of $24,496.50 over a thousand runs.
| Workload | GPT-5.4 Mini | GPT-5.4 Pro | ×1,000 | Difference |
|---|---|---|---|---|
| Chat turn 1,000 in / 500 out | $0.0030 | $0.1200 | $3.00 / $120.00 | GPT-5.4 Mini is 98% cheaper |
| RAG answer 10,000 in / 800 out | $0.0111 | $0.4440 | $11.10 / $444.00 | GPT-5.4 Mini is 98% cheaper |
| Agent loop 32,000 in / 700 out × 20 calls | $0.1380 | $21.72 | $138.00 / $21,720.00 | GPT-5.4 Mini is 99% cheaper |
| Long document 400,000 in / 3,000 out | $0.3135 | $24.81 | $313.50 / $24,810.00 | GPT-5.4 Mini is 99% cheaper |
One of these models lists no cached-input price, so its cached tokens are charged at the full input rate.
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: GPT-5.4 Pro's input goes from $30.00 to $60.00. It does not change which of the two is cheaper.
| Context band | Price | GPT-5.4 Mini | GPT-5.4 Pro | Difference |
|---|---|---|---|---|
| Prompts up to 272,000 tokens | Input | $0.75 | $30.00 | GPT-5.4 Mini is 98% cheaper |
| Prompts up to 272,000 tokens | Cached input | $0.075 | — | |
| Prompts up to 272,000 tokens | Output | $4.50 | $180.00 | GPT-5.4 Mini is 98% cheaper |
| Prompts over 272,000 tokens | Input | $0.75 | $60.00 | GPT-5.4 Mini is 99% cheaper |
| Prompts over 272,000 tokens | Cached input | $0.075 | — | |
| Prompts over 272,000 tokens | Output | $4.50 | $270.00 | GPT-5.4 Mini is 98% cheaper |
Blended: GPT-5.4 Mini $1.6875, GPT-5.4 Pro $67.50 per 1M — 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 — 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 — how we read tiers.
| Tier | GPT-5.4 Mini | GPT-5.4 Pro | Cheaper |
|---|---|---|---|
| Batch | $0.375 in / $2.25 out 50% off Standard | $15.00 in / $90.00 out 50% off Standard | GPT-5.4 Mini |
| Flex | $0.375 in / $2.25 out 50% off Standard | $15.00 in / $90.00 out 50% off Standard | GPT-5.4 Mini |
Benchmarks
GPT-5.4 Pro is ahead on the one figure both models report, physics research reasoning (CritPt), by 20 points.
Physics research reasoning
CritPt — Unpublished physics research reasoning problems
GPT-5.4 Pro ahead by 20
Each figure is that model's best published run, with the effort level named beside it — where these scores come from.
Specifications
GPT-5.4 Pro holds 650,000 more input tokens in one request.
| Specification | GPT-5.4 Mini | GPT-5.4 Pro |
|---|---|---|
| Context window | 400,000 tokens | 1,050,000 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 | 5 Mar 2026 |
| Status | Active | Active |
| Sold by | OpenAI, Perplexity | OpenAI |
FAQs
- Is GPT-5.4 Mini cheaper than GPT-5.4 Pro?
- Yes. A 1,000-token prompt with a 500-token reply costs $0.0030 on GPT-5.4 Mini and $0.1200 on GPT-5.4 Pro, and the same model is cheaper on every workload on this page.
- How much do GPT-5.4 Mini and GPT-5.4 Pro cost per 1M tokens?
- GPT-5.4 Mini costs $0.75 for input and $4.50 for output. GPT-5.4 Pro costs $30.00 and $180.00. Standard pay-as-you-go rates.
- Which is better, GPT-5.4 Mini or GPT-5.4 Pro?
- On published benchmarks, GPT-5.4 Pro. It leads on 1 of the 1 figures both models report, including physics research reasoning (CritPt), where it scores 30 against 10.
- Is Batch pricing cheaper for GPT-5.4 Mini or GPT-5.4 Pro?
- Batch input costs $0.375 on GPT-5.4 Mini and $15.00 on GPT-5.4 Pro, 50% below the standard rate on both.
- Does GPT-5.4 Mini or GPT-5.4 Pro have a bigger context window?
- GPT-5.4 Pro, at 1,050,000 tokens against 400,000. That is 650,000 more input tokens in a single request.