Grok 4.5

New

x-ai/grok-4.5-20260708

xAI: Grok 4.5, provided by x‑ai, accepts text, image, and file inputs and generates text output. It supports a context length of 500 000 tokens, with pricing of $2 per million input tokens and $6 per million output tokens, and offers both tool use and reasoning capabilities.

  • tool use
  • structured outputs
  • reasoning

At a glance

providerx-ai
releasedJul 8, 2026
context500K
input / M$2

Specifications

What the API gives you

Context window
500K tokens
Max output
—
Input price
$2 / 1M tokens
Output price
$6 / 1M tokens
Cache read
$0.30 / 1M tokens
Modalities
text, image, file → text
Knowledge cutoff
—
Released
Jul 8, 2026

Recommendation coverage

Where this model appears

  1. #2Best LLM for Frontend & UI
  2. #4Best LLM for Tool & Function Calling
  3. #4Best LLM for Coding
  4. #5Best Cheap LLM for High Volume
  5. #5Best LLM for Autonomous Agents
  6. #6Best LLM for AI Agents
  7. #6Best LLM for Agentic Coding
  8. #7Best LLM for Chat & Roleplay
  9. #7Best LLM for Marketing Copy
  10. #8Best LLM for Writing
  11. #8Best LLM for Computer & Browser Use

Measured evidence

Public benchmark record

LMArena Agent
52026-07-13
LMArena Agent
6.42026-07-20
LMArena Text
1452 Elo2026-07-16
LMArena Text
1476 Elo2026-07-20
LMArena WebDev
1558 Elo2026-07-16
LMArena WebDev
1556 Elo2026-07-20

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open.

Catalog data via OpenRouter and models.dev. Last checked within the past 6 hours.