Claude Opus 5.5 vs Grok Build 0.1

Price, context window & benchmark comparison

A

Claude Opus 5.5

Anthropic
$4.00 / $20.00
Input / Output · per 1M tokens
VS
X

Grok Build 0.1

xAI
$1.00 / $2.00
Input / Output · per 1M tokens
Compare different models
A
X
Verdict: Grok Build 0.1 is 6.4× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 has the larger context window (1M vs 256K).
Claude Opus 5.5Grok Build 0.1
Input price / 1M$4.00$1.00
Output price / 1M$20.00$2.00
Blended price (3:1)$8.00$1.25
Cached input / 1M$0.20$0.20
Context window1M256K
Max output128K230K
Intelligence index57.6—
Coding index—51.5
Providers114
Best provider uptime (30m)100.0%100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-222026-05-20
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Opus 5.5 or Grok Build 0.1?

Grok Build 0.1 is 6.4× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Grok Build 0.1: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Grok Build 0.1: 256,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Grok Build 0.1 ≈ $3,000.

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