AI Models · Open-Source vs Paid

Gemma 4 31B Open vs KWKAT-Coder-Pro V2 Paid

Gemma 4 31B vs KAT-Coder-Pro V2 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.

KAT-Coder-Pro V2 — full profile ›

Prices & specs refreshed from live data · olud.ai

Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.

Gemma 4 31BOpenGoogle

$0.09 /M input
$0.34 /M outputNo per-token fees if you self-host

TypeOpen-weight

Context window262K tokens

MultimodalYes

Self-hostYes

KWKAT-Coder-Pro V2PaidKwaipilot

$0.3 /M input
$1.2 /M outputManaged API (no infra to run)

TypeProprietary

Context window262K tokens

MultimodalNo

Self-hostNo

Choose Gemma 4 31B if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose KAT-Coder-Pro V2 if you want frontier capability through a managed API with zero infrastructure to run.

Gemma 4 31B vs KAT-Coder-Pro V2 specs

Spec	Gemma 4 31B	KAT-Coder-Pro V2	Winner
Maker	Google	Kwaipilot	–
Type	Open-weight	Proprietary	Gemma 4 31B
Context window	262K tokens	262K tokens	= Tie
Input price	$0.09/M · free self-host	$0.3/M	Gemma 4 31B
Output price	$0.34/M · free self-host	$1.2/M	Gemma 4 31B
Vision / multimodal	Yes	No	Gemma 4 31B
Tool / function calling	Yes	Yes	= Tie
Self-hostable	Yes	No (API only)	Gemma 4 31B
License	Gemma License	Proprietary	Gemma 4 31B

Price gap & when to choose each

3.5×cheaper per output token

Gemma 4 31B is ~3.5× cheaper than KAT-Coder-Pro V2 on output tokens ($0.34 vs $1.2 per M tokens).

Choose Gemma 4 31B if…

You want to self-host or run on your cloud
You prioritize data privacy & control
You want the lowest operating costs
You are building open or reproducible AI

KWChoose KAT-Coder-Pro V2 if…

You want frontier performance through a managed API
You value reliability & ecosystem
You don't want to manage infrastructure

Feature comparison

Capability	Gemma 4 31B	KAT-Coder-Pro V2
Open weights (downloadable)	✓	✗
Self-hostable	✓	✗
Runs fully offline	✓	✗
Vision / multimodal	✓	✗
Tool / function calling	✓	✓
1M+ context window	✗	✗

Benchmarks: Gemma 4 31B vs KAT-Coder-Pro V2

Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).

Gemma 4 31B

KAT-Coder-Pro V2

Intelligence index

21.7

Coding index

43.4

59.5

GPQA

85.7%

85.5%

Humanity's Last Exam

23.6%

16.1%

Long Context Reasoning

69.7%

73%

SciCode

45.5%

–

IFBench

75.6%

66.7%

τ²-Bench

59.9%

89.5%

τ-Bench Banking

14.8%

4.5%

Terminal-Bench

43.4%

70%

Terminal-Bench Hard

36.4%

49.2%

Speed

35.3 tok/s

0 tok/s

Latency

0.95s

Intelligence per $

–

41.3

Benchmark data by Artificial Analysis.

How Gemma 4 31B and KAT-Coder-Pro V2 score

🏆 Best value & openness: Gemma 4 31B (4.8 vs 2.9 / 5)

Criterion	Gemma 4 31B	KAT-Coder-Pro V2
Cost-efficiency	5.0	4.5
Context window	4.0	4.0
Openness	5.0	1.5
Self-hosting	5.0	1.0
Multimodality	5.0	3.5

Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.

What each model is

Gemma 4 31B Open

Google · Open-weight

Gemma 4 31B Instruct is Google DeepMind's 30.7B dense multimodal model supporting text and image input with text output. Features a 256K token context window, configurable thinking/reasoning mode, native function...

KAT-Coder-Pro V2 Paid

Kwaipilot · Proprietary

KAT-Coder-Pro V2 is the latest high-performance model in KwaiKAT’s KAT-Coder series, designed for complex enterprise-grade software engineering and SaaS integration. It builds on the agentic coding strengths of earlier versions,...

Other models in these families

These variants are tracked but not compared here — one page per family keeps the comparison readable.

Other variants tracked

Gemma 4 31B (free)Gemma 4 26B A4BGemma 4 26B A4B (free)Gemma 3 27BGemma 3 4BGemma 3 12BGemma 2 27B

Frequently asked questions

Is Gemma 4 31B as good as KAT-Coder-Pro V2?

Gemma 4 31B is open-weight and competitive on many tasks, but KAT-Coder-Pro V2 may still lead on the hardest reasoning and agentic work. The gap keeps narrowing — benchmark both on your actual use case before deciding.

Can I run Gemma 4 31B locally?

Yes. Gemma 4 31B has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. KAT-Coder-Pro V2 is API-only and cannot be self-hosted.

How much cheaper is Gemma 4 31B?

Gemma 4 31B costs $0.34/M output vs $1.2/M for KAT-Coder-Pro V2 — roughly 4x cheaper via API, and free if you self-host.

Gemma 4 31B vs KAT-Coder-Pro V2 — which should I pick in 2026?

Choose Gemma 4 31B if you want to self-host, keep your data private and skip per-token fees — it's open-weight and runs on your own hardware. Choose KAT-Coder-Pro V2 if you want frontier capability through a managed API with zero infrastructure to run.

People also compare

DeepSeek V4.1 Flash vs KAT-Coder-Pro V2 GLM 5.3 vs KAT-Coder-Pro V2 Hy3 vs KAT-Coder-Pro V2 MiMo-V2.5-Pro vs KAT-Coder-Pro V2 Nemotron 3 Ultra vs KAT-Coder-Pro V2 MiniMax M3 vs KAT-Coder-Pro V2

Explore more open-source AI

Browse the full open-source model leaderboard, thousands of tools and live benchmarks — all in one place.

Open the leaderboard →