Claude Opus 4.5 vs Grok-4

Side-by-side comparison of pricing, features, and capabilities

Pricing

Input / 1M tokens
$5.00
$3.00
Output / 1M tokens
$25.00
$15.00
Avg. Cost / 1M
$15.00
$9.00

Specifications

Context Window
200K
256K
Tier
frontier
frontier
Provider
Anthropic
xAI

Capabilities

Feature
claude-opus-4.5
grok-4
text
code
vision
reasoning
long context

Verdict

Best for Cost

grok-4 is 40% cheaper on average

Best for Quality

Both models are in the same performance tier

Best for Long Documents

grok-4 has a larger context window (256K)

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