GPT-5.4 vs GPT-5.5: API Pricing
Input and output token rates, context windows, and real monthly cost for GPT-5.4 (OpenAI) and GPT-5.5 (OpenAI), side by side. Prices are standard on-demand rates as of June 2026.
The short answer
For a typical coding-agent workload (60M in / 12M out per month), GPT-5.4 is the cheaper option at $330/mo versus $660/mo for GPT-5.5 - about 50% less (2.0× cheaper). On the headline sticker of 1M input + 1M output, GPT-5.4 is $17.50 and GPT-5.5 is $35.00.
Rates at a glance
| GPT-5.4 | GPT-5.5 | |
|---|---|---|
| Input ($/1M tokens) | $2.50 | $5.00 |
| Output ($/1M tokens) | $15.00 | $30.00 |
| Blended (1M in + 1M out) | $17.50 | $35.00 |
| Context window | 1,050K | 1,050K |
| Type | Proprietary | Proprietary |
| Provider | OpenAI | OpenAI |
Monthly cost by workload
Estimated monthly API spend at each workload's token volume. Output usually costs several times input, so the winner can flip with your mix.
| Workload | GPT-5.4 | GPT-5.5 | Cheaper |
|---|---|---|---|
| Chatbot / assistant 10M in / 3M out | $70.00/mo | $140/mo | GPT-5.4 |
| Coding agent 60M in / 12M out | $330/mo | $660/mo | GPT-5.4 |
| RAG / summarization 40M in / 4M out | $160/mo | $320/mo | GPT-5.4 |
| Batch / classification 20M in / 2M out | $80.00/mo | $160/mo | GPT-5.4 |
Want your own in/out split? Use the full interactive comparator to rank every model and provider for your exact workload.
Frequently asked questions
Is GPT-5.4 or GPT-5.5 cheaper?
It depends on your input/output mix, but for a typical coding-agent workload (60M in / 12M out per month) GPT-5.4 costs $330/mo versus $660/mo for GPT-5.5 - about 50% less (2.0x). On the headline sticker (1M input + 1M output), GPT-5.4 is $17.50 and GPT-5.5 is $35.00.
What are the token rates for GPT-5.4 and GPT-5.5?
GPT-5.4 (OpenAI) is $2.50 per 1M input and $15.00 per 1M output. GPT-5.5 (OpenAI) is $5.00 per 1M input and $30.00 per 1M output. These are standard on-demand rates, not cached or batch.
Is GPT-5.4 or GPT-5.5 open-weight?
GPT-5.4 is proprietary and GPT-5.5 is proprietary. Both are closed models billed only through their owner's API.
What context window do GPT-5.4 and GPT-5.5 support?
GPT-5.4 supports 1,050K tokens and GPT-5.5 supports 1,050K tokens. Some models also step up pricing past a size threshold - check the source pricing pages for long-context tiers.
More pricing comparisons
Stay ahead of the AI tools curve
Picks, reviews, and automation tips every weekday. Free, no spam.