Breaking

xAI's Grok 4.7 and Anthropic's Claude Opus 5.5 Turn Frontier AI Race Toward Price, Agents and Long Context

September 24, 2026 at 01:16 EDT

Foundation Models
AI Agents
Software Dev & Coding

xAI and Anthropic have released closely watched frontier models days apart, setting up a new comparison between Grok 4.7 and Claude Opus 5.5 for coding, agentic work and professional knowledge tasks. Grok 4.7 emphasizes lower API pricing and stronger coding performance, while Claude Opus 5.5 positions itself as a higher-context, higher-cost model for long-running agents and complex enterprise workflows.

Sep. 24, 2026 · Frontier models

Grok 4.7 vs Claude Opus 5.5

Two new models sharpen the trade-off for AI teams: Grok 4.7 leans into lower token cost, while Claude Opus 5.5 offers a larger context window for long-running agent work.

Grok 4.7 output price per 1M tokens

$20

Claude Opus 5.5 output price per 1M tokens

500K

Grok 4.7 context window

Claude Opus 5.5 context window

Output-token price comparison

Grok 4.7

$20

Claude Opus 5.5

Each block represents $1 per million output tokens. Claude's listed output-token price is more than three times Grok's official API price.

Why teams may pick Grok

Lower listed token prices and competitive coding benchmarks make Grok 4.7 attractive for cost-sensitive agent and coding workloads.

Why teams may pick Claude

Claude Opus 5.5 offers a 1M-token context window, broader listed provider access and enterprise reports of better long-session behavior.

The buyer question

The comparison is not a single winner-take-all benchmark. It is a workload decision: price per run, context length, provider availability, API changes and safety constraints all matter before deploying either model in production.

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