AI model comparison

GPT-5.6 Luna vs MiMo-V2.5

Side by side comparison of GPT-5.6 Luna and MiMo-V2.5 on pricing, benchmark scores, context window, and more.

GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series.

Input / 1M: $0.20
Output / 1M: $1.20
Context: 1.05M

MiMo-V2.5 is a native omnimodal model by Xiaomi.

Input / 1M: $0.40
Output / 1M: $2
Context: 1.05M

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At a glance

Quick verdict

How the two models stack up on the things people ask about most.

Lower price

GPT-5.6 Luna

1.8x cheaper for a typical chat

Higher intelligence score

Not available

Not enough benchmark data

Larger context window

Tie

1.05M vs 1.05M tokens

Newer release

GPT-5.6 Luna

Released July 9, 2026

Benchmarks

Benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

GPT-5.6 LunaNot available

MiMo-V2.5Not available

Coding index

GPT-5.6 Luna71.4

MiMo-V2.556.8

Agentic index

GPT-5.6 Luna42.1

MiMo-V2.515.8

Pricing

GPT-5.6 Luna vs MiMo-V2.5 API pricing

Per-token API rates. Cheaper option highlighted.

Metric	GPT-5.6 Luna	MiMo-V2.5
Input tokensPer 1M tokens	$0.20	$0.40
Output tokensPer 1M tokens	$1.20	$2
Cached input (read)Per 1M tokens	$0.02	$0.08
Cache writePer 1M tokens	$0.25	Not available
Long-context pricingPer 1M tokens, for very long prompts	$0.40 in / $1.80 out above 272K	Same rate at any length
Web searchPer request	$0.01	Not available

What it costs in practice

Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.

Chat message

2K in, 500 out

GPT-5.6 Luna$1

MiMo-V2.5$1.80

Coding task

30K in, 4K out

GPT-5.6 Luna$10.80$5.40 cached

MiMo-V2.5$20$10.40 cached

Long document summary

150K in, 2K out

GPT-5.6 Luna$32.40$5.40 cached

MiMo-V2.5$64$16 cached

Specs

Context window and capabilities

How much each model can read, how much it can write, and what it accepts as input.

Metric	GPT-5.6 Luna	MiMo-V2.5
Context window	1.05M tokens	1.05M tokens
Max output	128K tokens	66K tokens
Input types	File, Image, Text	Audio, Image, Text, Video
Output types	Text	Text
Reasoning effort levels	Max, Extra high, High, Medium, Low, None	Not available
Default reasoning effort	Medium	Not available
Release date	July 9, 2026	April 22, 2026

Features

Supported features

API features available for each model.

Metric	GPT-5.6 Luna	MiMo-V2.5
Tool calling	Supported	Supported
Structured outputs	Supported	Supported
JSON mode	Supported	Supported
Reasoning	Supported	Supported
Temperature	Not supported	Supported
Stop sequences	Not supported	Supported
Deterministic seed	Supported	Supported
Verbosity control	Supported	Not supported

Our take

GPT-5.6 Luna is 1.8x cheaper for a typical chat. The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.

FAQ

Frequently asked questions

Is GPT-5.6 Luna or MiMo-V2.5 cheaper?

GPT-5.6 Luna is cheaper for a typical chat (2K input tokens and 500 output tokens). GPT-5.6 Luna costs $0.20 per 1M input tokens and $1.20 per 1M output tokens, while MiMo-V2.5 costs $0.40 per 1M input tokens and $2 per 1M output tokens.

Which has a bigger context window, GPT-5.6 Luna or MiMo-V2.5?

GPT-5.6 Luna supports up to 1.05M tokens of context, compared with 1.05M for MiMo-V2.5.

Can I use GPT-5.6 Luna and MiMo-V2.5 at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GPT-5.6 Luna and MiMo-V2.5 answer side by side and keep the better response.

Why choose? Ask both.

Send one prompt to GPT-5.6 Luna and MiMo-V2.5 at the same time. Compare the answers side by side and keep the best one.

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