AI Models · Open-Source vs Paid

Mistral Large 4 Open vs o3 Paid

Mistral Large 4 vs o3 compared — price per token, context window, multimodality, openness and which to choose. Can the open-source model replace the paid one? Full 2026 breakdown.

o3 — full profile ›

Prices & specs refreshed from live data · olud.ai

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

Mistral Large 4OpenMistral AI

$1.36 /M input
$4.18 /M outputNo per-token fees if you self-host

TypeOpen-weight

Context window1M tokens

MultimodalYes

Self-hostYes

o3PaidOpenAI

$2 /M input
$8 /M outputManaged API (no infra to run)

TypeProprietary

Context window200K tokens

MultimodalYes

Self-hostNo

Choose Mistral Large 4 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 o3 if you want frontier capability through a managed API with zero infrastructure to run.

Mistral Large 4 vs o3 specs

Spec	Mistral Large 4	o3	Winner
Maker	Mistral AI	OpenAI	–
Type	Open-weight	Proprietary	Mistral Large 4
Context window	1M tokens	200K tokens	Mistral Large 4
Input price	$1.36/M · free self-host	$2/M	Mistral Large 4
Output price	$4.18/M · free self-host	$8/M	Mistral Large 4
Vision / multimodal	Yes	Yes	= Tie
Tool / function calling	Yes	Yes	= Tie
Self-hostable	Yes	No (API only)	Mistral Large 4
License	Apache 2.0	Proprietary	Mistral Large 4

Price gap & when to choose each

1.9×cheaper per output token

Mistral Large 4 is ~1.9× cheaper than o3 on output tokens ($4.18 vs $8 per M tokens).

Choose Mistral Large 4 if…

You want to self-host or run on your cloud
You need the longer 1M context window
You prioritize data privacy & control
You want the lowest operating costs
You are building open or reproducible AI

Choose o3 if…

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

Feature comparison

Capability	Mistral Large 4	o3
Open weights (downloadable)	✓	✗
Self-hostable	✓	✗
Runs fully offline	✓	✗
Vision / multimodal	✓	✓
Tool / function calling	✓	✓
1M+ context window	✓	✗

Benchmarks: Mistral Large 4 vs o3

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

Mistral Large 4 delivers 3.2× more intelligence per dollar.

Mistral Large 4

Intelligence index

38.4

20.2

Humanity's Last Exam

35%

20.1%

Long Context Reasoning

81.3%

74.7%

SciCode

54.2%

–

Math index

–

88.3

GPQA

–

82.7%

MMLU-Pro

–

85.3%

LiveCodeBench

–

80.8%

MATH-500

–

99.2%

AIME

–

90.3%

AIME 2025

–

88.3%

IFBench

–

71.4%

τ²-Bench

–

80.7%

Terminal-Bench Hard

–

37.1%

Speed

79.4 tok/s

119.5 tok/s

Latency

1.03s

8.68s

Intelligence per $

18.6

5.8

Benchmark data by Artificial Analysis.

How Mistral Large 4 and o3 score

🏆 Best value & openness: Mistral Large 4 (4.8 vs 3.0 / 5)

Criterion	Mistral Large 4	o3
Cost-efficiency	4.0	3.5
Context window	5.0	4.0
Openness	5.0	1.5
Self-hosting	5.0	1.0
Multimodality	5.0	5.0

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

Mistral Large 4 Open

Mistral AI · Open-weight

Mistral Large 4 is a frontier multimodal (text and image input) model from Mistral AI built for reasoning, coding, and agentic workloads. It offers a 1M-token context window with up...

o3 Paid

OpenAI · Proprietary

o3 is a well-rounded and powerful model across domains. It sets a new standard for math, science, coding, and visual reasoning tasks. It also excels at technical writing and instruction-following....

Other models in these families

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

Other variants tracked

Mistral Medium 3.5Mistral Medium 3.5 (batch)Mistral Small 4Mistral Small 4 (batch)Mistral Large 3 2512Mistral Large 3 2512 (batch)Mistral Medium 3.1Mistral Medium 3.1 (batch)Mistral Medium 3Devstral 2 2512Mistral Small 3.1 24BMistral Small 3.2 24BMistral LargeMistral Large 2407Mistral Small 3SabaMinistral 3 14B 2512Mixtral 8x22B InstructMinistral 3 8B 2512Ministral 3 8B 2512 (batch)Ministral 3 3B 2512UncensoredCodestral 2508Codestral 2508 (batch)Voxtral Small 24B 2507Mistral Nemo

Other variants tracked

o3 Proo3 (batch)o3 Minio3 Mini (batch)o3 Mini High

Frequently asked questions

Is Mistral Large 4 as good as o3?

Mistral Large 4 is open-weight and competitive on many tasks, but o3 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 Mistral Large 4 locally?

Yes. Mistral Large 4 has open weights, so you can self-host it on your own GPUs or run it via a low-cost API. o3 is API-only and cannot be self-hosted.

How much cheaper is Mistral Large 4?

Mistral Large 4 costs $4.18/M output vs $8/M for o3 — roughly 2x cheaper via API, and free if you self-host.

Mistral Large 4 vs o3 — which should I pick in 2026?

Choose Mistral Large 4 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 o3 if you want frontier capability through a managed API with zero infrastructure to run.

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