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SpaceXAI (formerly xAI, owned by Musk)

Grok 4.5

CClosed

Released by SpaceXAI (formerly xAI) on July 9, 2026, built on a 1.5-trillion-parameter V9 base and jointly trained with Cursor. Token efficiency is 2x that of competitors, inference speed is 80 TPS, and SWE-bench Pro reaches 64.7%, surpassing GPT-5.5. Pricing is highly aggressive, at only 1/4 the cost of Opus.

API Pricing

Input

$2

Output

$6

Cached input

—

Peak hours

—

USD / 1M tokens

※ 60%+ cheaper than Claude Opus; token efficiency is 2x that of competitors

Price sourcedocs.x.ai ↗openrouter.ai ↗

Latest change：Down 7.4% vs previous（$15.88 → $14.71 / 1M）

Price history

8 snapshots · 2026-07-18 → 2026-08-17

Current: $14.71Period low: $14.71 (2026-08-17)Period high: $15.88 (2026-07-18)First tracked: $15.88 (2026-07-18)

Specifications

Context window
500K Tokens
Max output
450K Tokens
Total parameters
1.5T
License
Closed

Overall score

Total

47.6

Rank

#21

Tier

C

Data confidence

85%

Capability55
Scale35
Value49
Context65
Ecosystem21
Freshness47.8

Capabilities & use cases

SWE-bench_Pro 64.7%Terminal-bench_2.1 83.3%

Key capabilities

  • Real-time X platform data access
  • Multi-agent collaboration
  • DeepSearch
  • Jointly trained with Cursor

Best for

  • AI coding (deep Cursor integration)
  • Real-time information retrieval and analysis
  • High-concurrency agent tasks
  • Knowledge work automation
  • Mathematical reasoning

Official links

Website ↗API platform ↗Pricing page ↗Open in comparator ↗

Similar price

Qwen3.8-Max (Qwen) $6GPT-6.1 Terra $5GLM-5.3 $4.4GLM-5.1 $4.4Meta Muse Spark 1.3 $4.25Gemini 3.8 Flash $4.125

FAQ

What does Grok 4.5 cost?
Grok 4.5 is priced at $6 output and $2 input (USD per 1M tokens)
How large is the context window of Grok 4.5?
Grok 4.5 has a 500K Tokens context window with up to 450K Tokens output.
Where can I access Grok 4.5?
Official channels: Website and API platform.

Data is refreshed daily and cross-checked against two independent sources; please confirm pricing and specs on the vendor page.