gpt-5.5-pro
GPT-5.5 Pro — priced by OpenAI.
Published tiers
What the most recent complete run published for this model, one row per priced tier, each with the source it was read from.
| Tier | Input USD/1M | Output USD/1M | Verified | Read from | Reader | Flags |
|---|---|---|---|---|---|---|
| batch | 15 | 90 | 2 hours ago2026-08-16 18:02Z | OpenRouter models APIopenrouter.ai | openrouter_json | confirmed |
| batch:short_context | 15 | 90 | 2 hours ago2026-08-16 18:02Z | OpenAI API pricing (docs)platform.openai.com | openai_astro_props | confirmed |
| flat | 30 | 180 | 2 hours ago2026-08-16 18:02Z | OpenRouter models APIopenrouter.ai | openrouter_json | confirmed |
| flat:flex_short_context | 15 | 90 | 2 hours ago2026-08-16 18:02Z | OpenAI API pricing (docs)platform.openai.com | openai_astro_props | confirmed |
| flat:short_context | 30 | 180 | 2 hours ago2026-08-16 18:02Z | OpenAI API pricing (docs)platform.openai.com | openai_astro_props | confirmed |
Price history
Every distinct value this price has taken, oldest first — what the price did, not how often we happened to look. Rows marked backfill came from a public git history of a third-party pricing file and were never verified by us; they extend the series backwards and are flagged rather than hidden.
batch
2 distinct value(s)inputoutput · range 15–180 USD/1M
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-04-24 21:10Z | 2026-04-25 18:16Z | 30 | 180 | 2 | LiteLLM model_prices_and_context_window.json (git history) | never | backfillunconfirmed |
| 2026-04-27 22:33Z | 2026-08-16 18:02Z | 15 | 90 | 17 | OpenRouter models API | 2026-08-16 18:02Z |
batch:short_context
1 distinct value(s)One value across the whole archive: this price has not moved in anything we have observed.
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-08-16 04:15Z | 2026-08-16 18:02Z | 15 | 90 | 11 | OpenAI API pricing (docs) | 2026-08-16 18:02Z |
flat
2 distinct value(s)inputoutput · range 30–360 USD/1M
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-04-24 21:10Z | 2026-04-25 18:16Z | 60 | 360 | 2 | LiteLLM model_prices_and_context_window.json (git history) | never | backfillunconfirmed |
| 2026-04-27 22:33Z | 2026-08-16 18:02Z | 30 | 180 | 17 | OpenRouter models API | 2026-08-16 18:02Z |
flat:flex_short_context
1 distinct value(s)One value across the whole archive: this price has not moved in anything we have observed.
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-08-16 04:15Z | 2026-08-16 18:02Z | 15 | 90 | 11 | OpenAI API pricing (docs) | 2026-08-16 18:02Z |
flat:short_context
1 distinct value(s)One value across the whole archive: this price has not moved in anything we have observed.
| First seen | Last seen | Input USD/1M | Output USD/1M | Reads | Source | Last verified by us | Flags |
|---|---|---|---|---|---|---|---|
| 2026-08-16 04:15Z | 2026-08-16 18:02Z | 30 | 180 | 11 | OpenAI API pricing (docs) | 2026-08-16 18:02Z |
Provenance
Read by openai_astro_props, openrouter_json from OpenAI API pricing (docs), OpenRouter models API. Each row above links to the exact page its number came from. The vendor's page is authoritative: if it and this page disagree, the vendor is right and we are wrong.