GPT-5.5 Instant (May 2026)
Analysis Summary
GPT-5.5 Instant is a speed-optimised variant from OpenAI's GPT-5.5 family, with an intelligence index of 41.8 and a coding index of 45.1. The coding capability is a standout, placing it in the excellent tier for software engineering tasks. However, its agentic index of 45.9 is lower than the flagship GPT-5.5 variants, limiting its reliability for complex multi-step autonomous workflows.
For businesses, this model suits coding assistance, code review, and structured content generation where response speed matters. Its instruction following (ifbench 0.71) is adequate for most business content tasks, but long-context reasoning (lcr 0.56) is below the top tier, so it is less suited to full-document or large-codebase analysis. The absence of a listed context window in the data is a practical limitation to verify before deployment.
At $5 input and $30 output per million tokens, pricing is on the higher side for its benchmark tier. Teams that need OpenAI's ecosystem reliability and fast coding assistance will find it useful, but those prioritising agentic capability or long-context work should look at the full GPT-5.5 variants instead.
Assessed June 6, 2026
Editorial notes
GPT-5.5 Instant delivers strong coding performance and good reasoning from OpenAI, though its agentic index and long-context scores are below the top GPT-5.5 variants.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How GPT-5.5 Instant (May 2026) compares
GPT-5.5 Instant (May 2026) ranks #53 of 377 AI models we track for overall intelligence, #21 of 314 for coding, #102 of 289 for agentic tasks. At $5.00 per million input tokens it is cheaper than 7% of comparable models.
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does GPT-5.5 Instant (May 2026) stack up?
Compare side-by-side with other professional models.
Model Information
| Provider | OpenAI |
| Release Date | May 5, 2026 |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $5.00 | $0.005000 |
| Output | $30.00 | $0.030000 |
Leaderboard Categories
Frequently asked questions about GPT-5.5 Instant (May 2026)
How much does GPT-5.5 Instant (May 2026) cost?
GPT-5.5 Instant (May 2026) costs $5.00 per million input tokens and $30.00 per million output tokens.
Is GPT-5.5 Instant (May 2026) good for coding?
On our coding benchmark index, GPT-5.5 Instant (May 2026) ranks #21 of 314 models, placing it in the top quartile of the field for code generation and debugging.
Who created GPT-5.5 Instant (May 2026)?
GPT-5.5 Instant (May 2026) is developed by OpenAI and was released on May 5, 2026.
