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GPT-5.5 (medium)

OpenAI·Released 2026-04-23
Multimodal

Pricing

Input

$5.00

per 1M tokens

Output

$30.00

per 1M tokens

Blended

$11.25

per 1M tokens

Cheaper than 4% of models. Median price is $0.54/1M tokens.

Cost Calculator

Tokens per day1M
100K100M

Daily

$11.25

Monthly

$337.50

vs. Similar Models

Google: Gemini 3.5 FlashQ:-0.2
$3.38-70%
Z.ai: GLM 5.2Q:+0.7
$1.46-87%
OpenAI: GPT-5.4Q:+1.0
$5.63-50%
GPT-5.5 (high)Q:+2.7
$11.250%

Performance

71

tokens/sec

Faster than 36% of models

3.04

seconds

Faster than 20% of models

3.04

seconds

Faster than 49% of models

Market Median

94 tok/s

25% slower

Median TTFT

1.11s

173% slower

Throughput/Dollar

6

tok/s per $/1M

Speed Comparison

GPT-5.5 (low)
70 tok/s-0%
Z.ai: GLM 5
70 tok/s-1%
NVIDIA Nemotron Nano 9B V2 (Reasoning)
71 tok/s+1%

Benchmarks

MMLU-ProNot evaluated
GPQA Diamond
92.6%
HLE
40.6%
LiveCodeBenchNot evaluated
SciCode
53.5%
TerminalBench Hard
57.6%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBench
71.0%
Long Context Recall
72.3%
Tau2
91.8%
Market AverageTop Score

Quick Compare

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