Ways to buy 7
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 OpenAIflex, cheapest · cached $0.25 | $2.5 | $15 | $2.5 / $15-50% vs list | $0.25 | -50% vs list |
| OpenAI API The lab's own API · cached $0.5 | $5 | $30 | $5 / $30List price | $0.5 | List price |
 Azure AI FoundryDefault region · cached $0.5 | $5 | $30 | $5 / $30Same as list | $0.5 | Same as list |
 AWS Bedrockus-east-1 · cached $0.55 | $5.5 | $33 | $5.5 / $33+10% vs list | $0.55 | +10% vs list |
| Azure AI Foundry eu · cached $0.55 | $5.5 | $33 | $5.5 / $33+10% vs list | $0.55 | +10% vs list |
| Azure AI Foundry us · cached $0.55 | $5.5 | $33 | $5.5 / $33+10% vs list | $0.55 | +10% vs list |
| OpenAI fast · cached $1.25 | $12.5 | $75 | $12.5 / $75+150% vs list | $1.25 | +150% vs list |
USD per 1M tokens; batch $2.5 in, $15 out on the lab's API. Regions are separate routes.
Through a gateway
Your own numbers100M input and 20M output tokens a month: $1,100 direct.
Helicone$1,100+0%
Kong AI Gateway$1,100+0%
LiteLLM$1,100+0%
Vercel AI Gateway$1,100+0%
Cloudflare AI Gateway$1,155+5%
Requesty$1,155+5%
Eden AI$1,161+5.5%
OpenRouter$1,161+5.5%
No published token fee: Martian Gateway, Portkey, TrueFoundry AI Gateway.
Related models
| In / out per 1M | Cheapest route | ||||||
|---|---|---|---|---|---|---|---|
| GPT-6 Luna OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Luna Pro OpenAI · 1.05MCheapest: $0.1 on OpenAI (flex) | $0.1 | $0.5 | $0.1 / $0.5 | $0.2 | 1.05M | $0.1 on OpenAI (flex) | · |
| GPT-6 Sol OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
| GPT-6 Sol Pro OpenAI · 1.05MCheapest: $2 on OpenAI (flex) | $2 | $10 | $2 / $10 | $4 | 1.05M | $2 on OpenAI (flex) | · |
 Claude Fable 5.1Anthropic · 1M | $10 | $50 | $10 / $50 | $20 | 1M | Lab list price | · |
| Claude Opus 5 Anthropic · 1M | $5 | $25 | $5 / $25 | $10 | 1M | Lab list price | · |
| Claude Fable 5 Anthropic · 1M | $10 | $50 | $10 / $50 | $20 | 1M | Lab list price | · |
| Claude Opus 5.5 Anthropic · 1M | $4 | $20 | $4 / $20 | $8 | 1M | Lab list price | · |
About GPT-5.5
GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks.
Takes files, image, text in and returns text. First listed Apr 25, 2026. Up to 128K output tokens. Blended price $11.3 per 1M tokens at 3 input to 1 output. Overall score 15 on leadersboard.fru.dev (rank 10). Model id gpt-5-5.
Price history
List price since Apr 25, 2026, from Internet Archive snapshots of the OpenRouter catalog, then daily reads.
Questions
How much does GPT-5.5 cost?
$5 per million input tokens and $30 per million output tokens, with cached input at $0.5, or $2.5 and $15 through the Batch API.
What is the context window of GPT-5.5?
1.05M tokens, with up to 128K tokens of output.
Where is GPT-5.5 cheapest?
Of 7 routes tracked, OpenAI is cheapest at $2.5 input and $15 output per million tokens.
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.