Input
- Official OpenAI
- $5
- Here, from (−60%)
- $2
- Here, best (−70%)
- $1.5
gpt-5.5
GPT-5.5 API — price per token
GPT-5.5 is the previous-generation flagship — pinned for workloads evaluated against it, at the same list price as GPT-5.6 Sol.
Pricing per 1M tokens
| Rate | Official OpenAI | Here, from (−60%) | Here, best (−70%) |
|---|---|---|---|
| Input | $5 | $2 | $1.5 |
| Cached input | $0.5 | $0.2 | $0.15 |
| Cache write | $5 | $2 | $1.5 |
| Output | $30 | $12 | $9 |
Cached input
- Official OpenAI
- $0.5
- Here, from (−60%)
- $0.2
- Here, best (−70%)
- $0.15
Cache write
- Official OpenAI
- $5
- Here, from (−60%)
- $2
- Here, best (−70%)
- $1.5
Output
- Official OpenAI
- $30
- Here, from (−60%)
- $12
- Here, best (−70%)
- $9
Every request is metered at the official rate first, then your progressive B2C discount (60% at the start, up to 70% as cumulative top-ups grow) is subtracted before it touches your prepaid balance. Context window: 272K tokens. Max output: 32K tokens. Reasoning efforts: none, low, medium, high, xhigh.
Best for
- Workloads pinned to GPT-5.5 for reproducibility.
- Agentic coding and multi-step reasoning.
- Pipelines migrating gradually to the GPT-5.6 line.
Good to know
- Reasoning efforts none through xhigh; the max level is exclusive to the GPT-5.6 line.
- Same list price as gpt-5.6-sol — most new work should target the 5.6 line.
- Requests above 272K input tokens bill at OpenAI long-context rates: 2× input and 1.5× output on the whole request.
How to use GPT-5.5
Create a free account, generate one key, and point any OpenAI-compatible tool at https://openai.api.apitoken.sale/v1 with model ID gpt-5.5 — Responses and Chat Completions both work, authenticated with Authorization: Bearer. New accounts include $10 of API usage at official prices — enough to test the model before topping up.
Frequently asked questions
How much does the GPT-5.5 API cost?
Officially $5 per 1M input tokens and $30 per 1M output tokens — the same as GPT-5.6 Sol. With the apiToken.sale discount that starts at $2/$12 and reaches $1.50/$9.
GPT-5.5 or GPT-5.6 Sol?
They cost the same, so new projects should default to gpt-5.6-sol. Keep 5.5 when you have prompts or evals pinned to it.
What is the model ID?
gpt-5.5 — use it as-is on the OpenAI-compatible endpoint at https://openai.api.apitoken.sale/v1.
Run GPT-5.5 on the OpenAI-compatible API at up to 70% off — instant key, prepaid balance, card or crypto.