AI Index

Claude Opus 5.5vsGrok 4.7

Both language models, compared at each maker’s own API list prices. Every figure links to its source.

Compare at your usage

Every model priced for the same request
Prompt per request
Cache hits
Batch

8,000 tokens in, 2,000 out

Claude Opus 5.5 on Claude APIGrok 4.7 on xAI API
Rate appliedBase rateBase rate
Inputper 1M tokens$4.00 $2.00
Cache readper 1M tokens$0.20 $0.50
Outputper 1M tokens$20.00 $6.00
Cost per request$0.072$0.028
Per 1,000 requests$72.00$28.00

Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.

Cost per request as prompts grow

2K tokens out, list price on each maker’s API. Grok 4.7 charges $4.00 / $12.00 above 200K tokens. A line ends at the model’s context window.

0$1.00$2.00$3.00$4.000250K500K750K1Mprompt tokens per request200K8KClaude Opus 5.5$0.072 at 8KGrok 4.7$0.028 at 8K
  • Claude Opus 5.5 · Claude API
  • Grok 4.7 · xAI API

Where each stands among all scored models

Each line runs from the lowest to the highest score on the board; the tick is the median.

Epoch Capabilities Index#3 vs #36 of 118Grok 4.7: 156.1Claude Opus 5.5: 168.4LMArena Text#3 vs #62 of 163Grok 4.7: 1,441Claude Opus 5.5: 1,509LMArena Text · Coding#3 vs #61 of 163Grok 4.7: 1,494Claude Opus 5.5: 1,551LMArena Vision#2 vs #54 of 89Grok 4.7: 1,231Claude Opus 5.5: 1,321
  • Claude Opus 5.5
  • Grok 4.7

Key differences

Claude Opus 5.5Grok 4.7
InputMaker’s official API · global · USD
$4.00 / 1M tokens Claude API pricing · as of Nov 1, 2026
$2.00 / 1M tokens xAI models and pricing · as of Nov 1, 2026
OutputMaker’s official API · global · USD
$20.00 / 1M tokens Claude API pricing · as of Nov 1, 2026
$6.00 / 1M tokens xAI models and pricing · as of Nov 1, 2026
Context
1,000,000 Claude Opus 5.5 model overview · as of Nov 1, 2026
500,000 xAI models and pricing · as of Nov 1, 2026
Knowledge cutoff
Jun 2026 Claude Opus 5.5 model overview · as of Nov 1, 2026
May 2026 Grok 4.7 · as of Nov 1, 2026
Cache readMaker’s official API · global · USD
$0.20 / 1M tokens Claude API pricing · as of Nov 1, 2026
$0.50 / 1M tokens xAI models and pricing · as of Nov 1, 2026

These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.

Full comparison

Claude Opus 5.5 Anthropic Grok 4.7 xAI
Overview
ReleasedSep 22, 2026 Sep 21, 2026
Open weights— —
Knowledge cutoffJun 2026 May 2026
Specs
Context1M 500K
Max output128K 500K
Input modalitiesText, Image Text, Image
Output modalitiesText Text
ReasoningYes Yes
Reasoning effortsmax low, medium, high, xhigh
Tool useYes Yes
Structured outputYes Yes
Pricing · per 1M tokens
Input price$4.00Also priced under other conditions: Batch $2.00Also priced under other conditions: Prompts over 200K tokens
Output price$20.00Also priced under other conditions: Batch $6.00Also priced under other conditions: Prompts over 200K tokens
Cache read price$0.20 $0.50Also priced under other conditions: Prompts over 200K tokens
Cache write price$5.00Also priced under other conditions: 1-hour cache5-minute cache —
Cache write price (1-hour cache)$8.001-hour cache Not offered
Blended price (3 input : 1 output)$8.00 $3.00
Pricing under conditions · per 1M tokens
Input price, long promptsNot offered $4.00Prompts over 200K tokens
Output price, long promptsNot offered $12.00Prompts over 200K tokens
Batch input price$2.00Batch Not offered
Batch output price$10.00Batch Not offered
Cited scores
Epoch Capabilities Index168.4 156.1
LMArena Text1,509 high effort1,441 xhigh effort
LMArena Text · Coding1,551 high effort1,494 xhigh effort
LMArena Vision1,321 high effort1,231 xhigh effort
LMArena Text · Chinese1,574 high effort1,495 xhigh effort
Epoch AI · GPQA Diamond90.6% max effort92.7% xhigh effort
Epoch AI · FrontierMath Tiers 1–391.2% max effort53% xhigh effort

Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.

Model details and sources

Cited scores