GPT-5.5

OpenAI's flagship released April 2026; tiered pricing kicks in above ~272K tokens. 90% cached-input discount.

GPT-5.5 strengths

• State-of-the-art reasoning and agentic workflows
• 1M+ context window
• Strong coding and tool use
• Multimodal (text + image input)

Pricing & context

Cost guide: a typical call of about 10K input + 2K output tokens costs roughly $0.11 at list prices. Worth modelling against cheaper tiers before committing high-volume traffic.

When to choose GPT-5.5

GPT-5.5 is best for highest-stakes reasoning, complex agents, and frontier coding tasks where capability outweighs cost. If your workload is more cost-sensitive, weigh it against gpt-oss-120b (≈$0.03 input /1M) first.

GPT-5.5 FAQ

How much does GPT-5.5 cost?

GPT-5.5 is priced at $5.00 per 1M input tokens and $30.00 per 1M output tokens (public API list price), with a ~1.05M tokens (128K max output) context window. A typical call of about 10K input and 2K output tokens costs roughly $0.11.

What is GPT-5.5 best for?

GPT-5.5 by OpenAI is best for highest-stakes reasoning, complex agents, and frontier coding tasks where capability outweighs cost.

How does GPT-5.5 pricing compare to Claude Opus 4.8?

GPT-5.5 and Claude Opus 4.8 have the same input list price ($5.00 per 1M tokens); output pricing is $30.00 vs $25.00.

Is GPT-5.5 multimodal?

GPT-5.5 supports text, image.

Compare GPT-5.5 head-to-head

Tools that use GPT-5.5