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OpenAI: GPT-5.5

openai/gpt-5-5
CompareAPITry this model

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.

Modalities
In / out per 1M$5.00 / $30
Context1M
ReleasedApr 24, 2026

Providers

7 providers serve this model upstream.

Providers serving this model
ProviderInput /MOutput /MCache read /MLatency P50Throughput P50Uptime
OpenAI$2.50$15$0.25——100%
Azure$5.00$30$0.504.88s24 tps100%
Azureeastus2$5.50$33$0.55——100%
Azureswedencentral$5.50$33$0.552.50s59 tps100%
OpenAI$13$75$1.256.83s94 tps100%
OpenAI$5.00$30$0.503.71s51 tps99.78%
Amazon Bedrockus-east-1$5.50$33$0.55———

Market-wide measurements, refreshed every 15 minutes. They describe who serves GPT-5.5 in general, not how ProjectCOZY routes your requests.

Pricing

List rates per 1M tokens — what GPT-5.5 costs pay-as-you-go elsewhere, not what you pay here.

Input
$5.00
per 1M tokens
Output
$30
per 1M tokens
Cache read
$0.50
per 1M cached tokens
Included in every pass
GPT-5.5 is included in every ProjectCOZY pass at no extra cost — one flat rate, no per-token metering. The rates above are there for comparison.

Performance

Time to first token and output speed across every provider, over the last 3 days.

0.0s10.0s20.0s30.0s40.0s
Oct 16, 12 AMOct 16, 8 AMOct 16, 4 PMOct 17, 12 AMOct 17, 8 AMOct 17, 4 PMOct 18, 12 AMOct 18, 8 AMOct 18, 4 PMOct 19, 12 AMOct 19, 8 AM
Azure OpenAI Amazon Bedrock (us-east-1) OpenAI OpenAI
0 tok/s100 tok/s200 tok/s300 tok/s400 tok/s
Oct 16, 12 AMOct 16, 8 AMOct 16, 4 PMOct 17, 12 AMOct 17, 8 AMOct 17, 4 PMOct 18, 12 AMOct 18, 8 AMOct 18, 4 PMOct 19, 12 AMOct 19, 8 AM
Azure OpenAI Amazon Bedrock (us-east-1) OpenAI OpenAI

Uptime

100% of requests were served successfully over the last 3 days, across all providers.

Last 3 daysAvailability 99.83%
Oct 16, 2:00 PMNow
Availability over the last 24 hoursAvailability 99.85%
100% 98% 97% 95%
Oct 18, 2:30 PMNow

Apps

Tools that most often run GPT-5.5, by tokens this week.

Hermes AgentPersonal Agent · 38% of tokens23.4BFramer35% of tokens21.6BCodexCli Agent · 13.1% of tokens8.1BompCli Agent · 7% of tokens4.3BOpenClawPersonal Agent · 6.9% of tokens4.3B

Activity

247.1B tokens processed market-wide in the last month.

010.0B20.0B30.0B40.0B
Sep 19Sep 24Sep 29Oct 4Oct 9Oct 14Oct 19
Tokens

FAQ

Which model id do I use for GPT-5.5?
openai/gpt-5.5. Send it as the model field from any OpenAI-compatible client, against https://projectcozy.tech/v1.
How much context does GPT-5.5 hold?
1,050,000 tokens per request, of which up to 128,000 can be the response.
What can it accept and return?
Input: file, image, text. Output: text.
What does GPT-5.5 cost on a pass?
Nothing beyond the pass itself. Pay-as-you-go elsewhere it lists at $5.00 per 1M input tokens and $30 per 1M output tokens.
How current is its knowledge?
Training data runs to Dec 2025. Anything later has to come from your prompt or a tool call.
Who built GPT-5.5?
OpenAI, in the GPT family.

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