> Step 5 Preview vs Gemini 3.8 Flash: index scores ~175 and 171 (GPT-4 = 100), API prices, context windows and results on the same independent tests, side by side.

Up to four models

# Compare

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

[Step 5 Preview](https://themodelindex.org/models/step-5-preview/)

[Gemini 3.8 Flash](https://themodelindex.org/models/gemini-3-8-flash/)

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Next to Step 5 Preview

Cheapest at this level

MiMo-V2.6-Pro

Best open model, measured

Kimi K3

Closest rival, another lab

GPT-5.6 Terra

The version it replaced

Step 3

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

[Step 5 Preview](https://themodelindex.org/models/step-5-preview/)

~175

estimated

Weights

Closed

Released

Sep 2026

Price in / out

–

Context

–

Core tests taken

–

[Gemini 3.8 Flash](https://themodelindex.org/models/gemini-3-8-flash/)

171

159–182

Weights

Closed

Released

Sep 2026

Price in / out

$0.75 / $3.75

Context

1.05M

Core tests taken

4 of 8

Step 5 Preview and Gemini 3.8 Flash are too close to call (4 points apart, within the uncertainty) (one score is an estimate).

## Test by test · independent results · Epoch AI

Step 5 Preview

Gemini 3.8 Flash

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/step-5-preview-vs-gemini-3-8-flash/ · The Model Index · data as of 2026-10-01