Context Window
400,000
Input tokens
Model Cost Profile
Developer: openai· Tokenizer: GPT
Pricing updated Mar 18, 2026
Live Pricing
Input: $0.2000
Output: $1.25
Pricing via OpenRouter API · Last synced Mar 18, 2026 · MMLU score via public benchmark data
Provider Compliance
Context Window
400,000
Input tokens
Max Output
128,000
Completion tokens
Input Price / 1M
$0.2000
Prompt tokens
Output Price / 1M
$1.25
Completion tokens
Top Benchmark
65.7
MMLU score — best of MMLU, GPQA, MATH, HumanEval
Evaluation scores for OpenAI: GPT-5.4 Nano. The “Top Benchmark” shown above is the highest-priority score available (MMLU > GPQA > MATH > HumanEval).
Tool Calling Supported🔌 MCP Compatible
Price History
Not enough data yet. Price tracking started recently — check back in a few days.
Performance History
Not enough data yet. Performance tracking started recently — check back in a few days.
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $0.2000 |
| Output (Completion) | $1.25 |
| Cache Read | $0.0200 |
| Web Search | $10,000.00 |
Estimate monthly spend for OpenAI: GPT-5.4 Nano based on your workload.
Estimated Monthly Cost
$20
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.