Which is cheaper, Grok 3 or o3-mini?

o3-mini is cheaper for both input ($1.10/M tokens) and output ($4.40/M tokens), compared to Grok 3 at $3.00/$15.00 per million tokens.

Which is faster, Grok 3 or o3-mini?

Grok 3 is faster at 80 tokens/sec with a TTFT of 300ms, compared to o3-mini at 55 tokens/sec and 1500ms TTFT.

Which has a bigger context window, Grok 3 or o3-mini?

o3-mini has a 200K token context window, which is larger Grok 3's 128K context window.

Which is better for coding, Grok 3 or o3-mini?

o3-mini has a higher coding ELO of 1340 compared to Grok 3's 1290, making it the stronger choice for code generation and programming tasks.

Grok 3 vs o3-mini: Pricing, Benchmarks & Verdict (2026)

Name: Grok 3 vs o3-mini — Pricing, Benchmarks & Speed Comparison 2026
Creator: LLMversus
License: https://creativecommons.org/licenses/by/4.0/

Pricing verified Sep 14, 2026By LLMversusUpdated September 17, 2026View methodology

⚡ Quick Answer

o3-mini is significantly cheaper at $1.10/$4.40 per million tokens vs $3.00/$15.00. o3-mini is stronger for coding with a coding ELO of 1340 vs 1290. Grok 3 is faster at 80 tokens/sec vs 55 tokens/sec. o3-mini offers a larger 200K context window vs 128K.

Updated: September 14, 2026 · ✓ Pricing verified

Side-by-Side Comparison

Feature	Grok 3	o3-mini
Provider	xAI	OpenAI
Input Price / 1M tokens	$3.00	$1.10
Output Price / 1M tokens	$15.00	$4.40
Context Window	200K	128K
Max Output Tokens	8,192	65,536
Arena ELO	1,285	1,348
Coding ELO	1,280	1,348
TTFT (ms)	200	350
Tokens/sec	90	25
Multimodal	No	No
JSON Mode	Yes	Yes
Function Calling	Yes	No
Vision	No	No

When to Use Grok 3

Choose Grok 3 when you need: strong benchmark performance, good reasoning capabilities, vision and multimodal support, fast for its capability tier. It excels at general-purpose, reasoning, coding tasks.

Strengths:

Latest xAI model
Strong reasoning
Large context

Best for:

general-purposecodingreasoning

When to Use o3-mini

Choose o3-mini when you need: strong mathematical reasoning, good coding performance, affordable reasoning model, large output window. It excels at reasoning, math, coding, science tasks. It is also the more cost-effective option between the two. Its 200K context window is larger, making it better for long-document processing.

Strengths:

Strong reasoning
Good math skills
Affordable reasoning

Best for:

reasoningmathgeneral-purpose

Grok 3 vs o3-mini: Pricing, Benchmarks & Verdict (2026)

Side-by-Side Comparison

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