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💬 Text ModelProprietary

GPT-5.5

by OpenAI

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026
API Reference

Benchmark Evaluations

Codingswe-bench-pro

58.6%

Reasoninggpqa-diamond

93.6%

Pricing & Speed Details

Input Cost

$5.00

per 1M tokens
Output Cost

$30.00

per 1M tokens
Blended Cost

$11.25

based on 3:1 ratio
Speed

72.7 tps

Context Window

1.05M tokens

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Quick Info

  • ProviderOpenAI
  • CategoryText / Chat Generation
  • LicenseProprietary

Frequently Asked Questions

GPT-5.5 has a blended cost of $11.25 per 1 million tokens (calculated using a standard 3:1 input-to-output token ratio). Its specific pricing is $5.00 per 1M input tokens and $30.00 per 1M output tokens.

GPT-5.5 supports a context window of 1.05M tokens. This allows it to process large documents, codebase segments, or long chat histories in a single query session.

GPT-5.5 scores 58.6% on coding evaluations (SWE-bench-pro) and 93.6% on reasoning tasks (GPQA-diamond).

GPT-5.5 is an proprietary model developed by OpenAI.