xAI

Grok 4.5

CTX500K

85Quality

Reasoning · Vision · Tools

Input$2/M

Output$6/M

xAI's Grok model for chat, coding, agentic tools, and lower hallucination risk

PaidProprietary942/1040

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xAITextUncommon

Grok 4.5

xAI's Grok model for chat, coding, agentic tools, and lower hallucination risk

grok-4.5

Type: Text
Quality: 85 · Top 15% on the Epoch Capabilities Index
Context window: 500,000 tokens
Max output: 500,000 tokens
Input price: $2.00 / 1M tokens
Output price: $6.00 / 1M tokens
Cache read: $0.30 / 1M tokens
Cache write: —
Released: Jul 8, 2026
Knowledge cutoff: —
Takes in: Text, Image, PDF
Puts out: Text
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
File attachments: Yes
Access: Paid
License: Proprietary
Rarity: Uncommon
Set number: 942/1040

Open xAI docs Quality 85 Where to run it 28 Evolution 3/5 Meet its creature Battle Qwen3.8 Max

Weights aren’t public. Use is governed by xAI’s terms. Specs from models.dev, last changed Oct 18, 2026. Official source: docs.x.ai.

How good is it?

Public leaderboard scores for Grok 4.5, refreshed daily from Epoch AI and LMArena.

Top 15% of the 277 models on the Epoch Capabilities Index: #42.

Quality is the share of a leaderboard’s models this one beats, from 0 to 100. Chat models are rated on Epoch AI’s Capabilities Index when it lists them, otherwise on LMArena; image and video models on LMArena’s image and video arenas.

Leaderboards

Epoch Capabilities Index#42 of 277
One number fitted from dozens of hard benchmarks, from science questions to agentic coding.153.9 index
LMArena Text#56 of 416
People compare two anonymous answers and vote for the better one.1,448 rating
LMArena Text · Coding#61 of 411
The text arena’s coding prompts only.1,474 rating
LMArena Text · Math#57 of 400
The text arena’s math prompts only.1,459 rating
LMArena Text · Creative writing#40 of 414
The text arena’s creative writing prompts only.1,442 rating
LMArena WebDev#40 of 144
Each model builds a web app from the same prompt; people pick the better one.1,553 rating
LMArena Vision#31 of 165
Questions about images, voted by people.1,288 rating

Benchmarks Epoch AI runs

Scores from Epoch AI and LMArena, licensed CC BY 4.0. Boards list models under their own names, so a close match is shown with the name it was scored under. Credits

Where to run it

28 providers sell Grok 4.5 through an API. Prices are per million tokens, cheapest first.

Cheapest302.AI$2.00 in · $6.00 out
Free to try1 providerKenari
From the labxAI$2.00 in · $6.00 out

API providers

Provider	Input	Output	Context
KenariFree`grok-4-5`	Free	Free	500K
302.AICheapest paid`grok-4.5`	$2.00	$6.00	500K
Abacus`grok-4.5`	$2.00	$6.00	500K
AIHubMix`grok-4.5`	$2.00	$6.00	1M
Cloudflare AI Gateway`xai/grok-4.5`	$2.00	$6.00	500K
CommandCode`xai/grok-4.5`	$2.00	$6.00	500K
CrossModel`x-ai/grok-4.5`	$2.00	$6.00	500K
DaoXE`grok-4.5`	$2.00	$6.00	500K
DevPass (LLM Gateway)`grok-4-5`	$2.00	$6.00	500K
Eden AI`xai/grok-4.5`	$2.00	$6.00	500K

Show 18 more providers

Provider	Input	Output	Context
GitHub Copilot`grok-4.5`	$2.00	$6.00	500K
Impossibl`xai/grok-4.5`	$2.00	$6.00	500K
Kilo Gateway`x-ai/grok-4.5`	$2.00	$6.00	500K
LLM Gateway`xai/grok-4-5`	$2.00	$6.00	500K
Merge Gateway`xai/grok-4.5`	$2.00	$6.00	500K
NanoGPT`x-ai/grok-4.5`	$2.00	$6.00	500K
Ofox`x-ai/grok-4.5`	$2.00	$6.00	500K
OpenCode`grok-4.5`	$2.00	$6.00	500K
OpenRouter`x-ai/grok-4.5`	$2.00	$6.00	500K
Opper`grok-4.5`	$2.00	$6.00	500K
OrcaRouter`grok/grok-4.5`	$2.00	$6.00	500K
Pioneer`grok-4.5`	$2.00	$6.00	500K
Requesty`grok-4.5`	$2.00	$6.00	500K
Tempr Gateway`xai/grok-4.5`	$2.00	$6.00	500K
Vercel AI Gateway`spacexai/grok-4.5`	$2.00	$6.00	500K
xAIOfficial`grok-4.5`	$2.00	$6.00	500K
ZenMux`x-ai/grok-4.5`	$2.00	$6.00	500K
Venice AI`grok-4-5`	$2.27	$6.80	500K

From models.dev and Hugging Face, checked daily. Resellers’ listings can lag behind their price pages, so confirm with the provider before you commit.

Face off

Current text models from other labs at a similar output price.

Grok 4.5

Grok 4.5

How good is it?

Leaderboards

Benchmarks Epoch AI runs

Where to run it

API providers

Face off

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