GPT-5.5 Instant

OpenAI

10/10

Provisional 0 practitioner reviews

Data source: This is a provisional model-fit score based on public benchmark signals, provider pricing/context data, and manual curation. It is not yet backed by approved practitioner reviews.

Context window

1,000,000 tokens

Input tokens per dollar

500,000

Output tokens per dollar

250,000

Dimension Breakdown

Tool Calling 10/10

Reliability of function/tool calling — correct schema adherence and parameter extraction

Cost Efficiency 9/10

Price per token relative to output quality for agent tasks

Latency 10/10

Response time — time to first token and total generation time under load

API Reliability 9/10

Uptime, rate limit headroom, and error rates in production

Context Quality 10/10

Long-context coherence and instruction following over turns

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Top Use Cases

Coding RAG General

Summary

Current SOTA model with 60/60 on Artificial Analysis Intelligence Index. Best-in-class for complex reasoning, coding, and multi-step agents.

Sources

OpenAI model documentation provider-docs
OpenAI API pricing pricing
Artificial Analysis leaderboard benchmark

Practitioner Reviews

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Last updated: May 8, 2026