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GPT-5.6 Luna (xhigh)

OpenAI·Released 2026-07-09
Multimodal

Pricing

Input

$1.00

per 1M tokens

Output

$6.00

per 1M tokens

Blended

$2.25

per 1M tokens

Cheaper than 26% of models. Median price is $0.67/1M tokens.

Cost Calculator

Tokens per day1M
100K100M

Daily

$2.25

Monthly

$67.50

vs. Similar Models

GPT-5.6 Terra (high)Q:-0.1
$5.63+150%
GPT-5.6 Sol (low)Q:+0.3
$11.25+400%
Google: Gemini 3.5 FlashQ:+1.1
$3.38+50%
GPT-5.5 (medium)Q:+1.3
$11.25+400%

Performance

208

tokens/sec

Faster than 89% of models

25.11

seconds

Faster than 5% of models

25.11

seconds

Faster than 21% of models

Market Median

93 tok/s

123% faster

Median TTFT

1.14s

2101% slower

Throughput/Dollar

93

tok/s per $/1M

Speed Comparison

GPT-5.6 Luna (Non-reasoning)
207 tok/s-1%
Gemini 3 Flash Preview (Reasoning)
206 tok/s-1%
GPT-5.6 Luna (high)
205 tok/s-2%

Benchmarks

MMLU-ProNot evaluated
GPQA Diamond
89.5%
HLE
35.6%
LiveCodeBenchNot evaluated
SciCode
50.0%
TerminalBench HardNot evaluated
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBenchNot evaluated
Long Context Recall
69.7%
Tau2Not evaluated
Market AverageTop Score

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