GPT-5.5 (low)

GPT-5.5 (low)

OpenAI · Released Apr 23, 2026 Professional New
Intelligence #18 / 523
82.0 Our Score
Speed #157 / 244
70.7 tokens / sec
Input #494 / 525
$5.00 per 1M tokens
Output #502 / 525
$30.00 per 1M tokens
Context
Not reported

Analysis Summary

GPT-5.5 (low) sits in the Professional tier on our leaderboard, ranked #18 of 523 published models on overall intelligence. At $5.00 input and $30.00 output per 1M tokens, it is among the most expensive on the market.

Editorial notes

GPT-5.5 Low from OpenAI sits at the frontier threshold with strong coding and reasoning scores, delivering reliable performance for agentic and coding workflows; premium pricing applies across the GPT-5.5 family.

Assessed April 24, 2026

Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?

Performance Profile

Intelligence8.8Technical9.3Value4.5Content7.8
Intelligence 8.8/10
Technical 9.3/10
Content 7.8/10
Value 4.5/10

Performance Indices

Source: Artificial Analysis

50.8 Intelligence Index
52.1 Coding Index
68.1 Agentic Index

This model was released recently. Independent benchmark evaluations are typically completed within days of release — these figures are preliminary and are likely to be updated as testing is finalised.

Benchmark Scores

Intelligence

GPQA Diamond 91% Graduate-level scientific reasoning
HLE 31% Humanity's Last Exam
SciCode 51.6% Scientific computing

Technical

TerminalBench Hard 52.3% Agentic terminal tasks
τ²-Bench 83.9% Conversational agent benchmark

Content

IFBench 64.4% Instruction following
LCR 72% Long-context reasoning

Benchmark data from Artificial Analysis and Hugging Face

How does GPT-5.5 (low) stack up?

Compare side-by-side with other professional models.

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Model Information

ProviderOpenAI
Release Date April 23, 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