> GPT-5.6 Terra vs MiMo-V2.6-Pro: index scores 178 and ~178 (GPT-4 = 100), API prices, context windows and results on the same independent tests, side by side.

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# Compare

Side by side on the same independent tests, with price and context. The link in your address bar shares this exact comparison.

[GPT-5.6 Terra](https://themodelindex.org/models/gpt-5-6-terra/)

[MiMo-V2.6-Pro](https://themodelindex.org/models/mimo-v2-6-pro/)

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Next to GPT-5.6 Terra

Best open model, measured

Kimi K3

Closest rival, another lab

Grok 4.7

Stronger for the same price

Claude Sonnet 5.5

Where it started

GPT-4

Presets

Best open vs best closed (measured)

Today vs GPT-4 (2023)

Top three labs

US vs China, best of each

[GPT-5.6 Terra](https://themodelindex.org/models/gpt-5-6-terra/)

178

167–189

Weights

Closed

Released

Jul 2026

Price in / out

$2.0 / $12

Context

1.05M

Core tests taken

4 of 8

[MiMo-V2.6-Pro](https://themodelindex.org/models/mimo-v2-6-pro/)

~178

estimated

Weights

Open

Released

Sep 2026

Price in / out

$0.43 / $0.87

Context

1.05M

Core tests taken

–

GPT-5.6 Terra and MiMo-V2.6-Pro are too close to call (0 points apart, within the uncertainty), at 8.3× the price (one score is an estimate).

## Test by test · independent results · Epoch AI

GPT-5.6 Terra

MiMo-V2.6-Pro

These models share no independent tests yet.

Only tests that at least two of these models have taken. Bold rows are the core tests shown on every profile; all of these results inform the index score. Task length (METR) is listed below the chart because it is a duration, not a percentage.

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Source: https://themodelindex.org/compare/gpt-5-6-terra-vs-mimo-v2-6-pro/ · The Model Index · data as of 2026-10-01