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AI model comparison

Step 5 Preview vs Hy3

Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.

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StepFun

Step 5 Preview

Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters).

Input / 1M
$1
Output / 1M
$2.70
Context
1M
tencent logo

Tencent

Hy3

Hy3 is a 295B-parameter Mixture-of-Experts model from Tencent (21B active, 192 experts with top-8 routing) built for reasoning, agentic workflows, and real-world production use.

Input / 1M
$0.08
Output / 1M
$0.33
Context
262K

At a glance

Quick verdict

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

Lower price

tencent logo

Hy3

10.2x cheaper for a typical chat

Higher intelligence score

Tie

Not enough benchmark data

Larger context window

stepfun logo

Step 5 Preview

1M vs 262K tokens

Newer release

stepfun logo

Step 5 Preview

Released October 8, 2026

Benchmarks

Benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

stepfun logoStep 5 PreviewNot available
tencent logoHy325.3

Coding index

stepfun logoStep 5 PreviewNot available
tencent logoHy358.8

Agentic index

stepfun logoStep 5 PreviewNot available
tencent logoHy324.1

Pricing

Step 5 Preview vs Hy3 API pricing

Per-token API rates. Cheaper option highlighted.

Metricstepfun logoStep 5 Previewtencent logoHy3
Input tokensPer 1M tokens$1$0.08
Output tokensPer 1M tokens$2.70$0.33
Cached input (read)Per 1M tokens$0.05$0.02
Cache writePer 1M tokensNot availableNot 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

stepfun logoStep 5 Preview$3.35
tencent logoHy3$0.33

Coding task

30K in, 4K out

stepfun logoStep 5 Preview$40.80$12.30 cached
tencent logoHy3$3.80$1.94 cached

Long document summary

150K in, 2K out

stepfun logoStep 5 Preview$155.40$12.90 cached
tencent logoHy3$13.04$3.75 cached

Specs

Context window and capabilities

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

Metricstepfun logoStep 5 Previewtencent logoHy3
Context window1M tokens262K tokens
Max output64K tokens128K tokens
Input typesImage, Text, VideoText
Output typesTextText
Reasoning effort levelsHigh, Medium, LowHigh, Low, None
Default reasoning effortMediumHigh
Release dateOctober 8, 2026July 6, 2026

Features

Supported features

API features available for each model.

Metricstepfun logoStep 5 Previewtencent logoHy3
Tool callingSupportedSupported
Structured outputsSupportedSupported
JSON modeSupportedSupported
ReasoningSupportedSupported
TemperatureSupportedSupported
Stop sequencesSupportedSupported
Deterministic seedNot supportedSupported
Verbosity controlNot supportedNot supported

Our take

Hy3 is 10.2x cheaper for a typical chat. Step 5 Preview has the larger context window (1M vs 262K tokens). 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 Step 5 Preview or Hy3 cheaper?

Hy3 is cheaper for a typical chat (2K input tokens and 500 output tokens). Hy3 costs $0.08 per 1M input tokens and $0.33 per 1M output tokens, while Step 5 Preview costs $1 per 1M input tokens and $2.70 per 1M output tokens.

Which has a bigger context window, Step 5 Preview or Hy3?

Step 5 Preview supports up to 1M tokens of context, compared with 262K for Hy3.

Can I use Step 5 Preview and Hy3 at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Step 5 Preview and Hy3 answer side by side and keep the better response.

stepfun logotencent logo

Why choose? Ask both.

Send one prompt to Step 5 Preview and Hy3 at the same time. Compare the answers side by side and keep the best one.

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