On the rate card Grok 4.7 is the cheaper flagship by a wide margin. On cache-heavy agent work and very long prompts, Claude Opus 5.5's pricing structure closes much of that gap.
Grok 4.7 costs half as much as Claude Opus 5.5 on input and about a third on output. But Opus 5.5's cache hit ($0.20) is cheaper than Grok's ($0.50), and Opus has no surcharge above 200K tokens — so for coding agents and long-document work the difference is far smaller than the headline suggests.
| Grok 4.7 | Claude Opus 5.5 | |
|---|---|---|
| Provider | SpaceXAI | Anthropic |
| Tier | Flagship | Flagship |
| Input / 1M tokens | $2.00 | $4.00 |
| Output / 1M tokens | $6.00 | $20.00 |
| Cache hit / 1M | $0.50 | $0.20 |
| Cache write / 1M | — | $5.00 |
| Context window | 500K | 1M |
| Notes | New flagship (Sep 21, 2026); larger base model, replaces 4.6 at the same price; ≥200K tokens: $4/$12, cache $1.00 | New leading Opus model (Sep 22, 2026); Fable 5.1-level performance at 20% less than Opus 5; included on Pro/Max/Team at no extra cost |
Grok 4.7 is 2.0× cheaper on input tokens ($2.00 vs $4.00 per 1M). Grok 4.7 is 3.3× cheaper on output tokens ($6.00 vs $20.00 per 1M).
| Workload | Grok 4.7 | Claude Opus 5.5 | Difference |
|---|---|---|---|
| Support chatbot 10,000 conversations × (2,000 input + 400 output tokens) | $64.00 | $160 | Grok 4.7 saves $96.00 |
| Document Q&A 1,000 questions × (30,000 input + 800 output tokens) | $64.80 | $136 | Grok 4.7 saves $71.20 |
| Coding agent session 4M input tokens (90% cache hits) + 150,000 output tokens | $3.50 | $5.32 | Grok 4.7 saves $1.82 |
Standard rates per 1M tokens from data on this site. The coding-agent row assumes 90% of input is read from the prompt cache (full input price where a model has no cache rate). Cache-write fees, batch discounts and long-context surcharges listed in the notes are not included. Updated November 2, 2026.
your prompts stay under 200K tokens and your workload is output-heavy — chat, drafting, bulk generation — where its $6.00 output rate keeps costs low.
you run agents that re-read a large cached context, send prompts between 200K and 1M tokens, or need more than Grok's 500K window.
Anthropic bills Opus 5.5 cache hits at 5% of input; xAI's Grok 4.7 cache hit is 25% of its input. When 90% of a coding agent's input is cached, Opus 5.5 pays less than Grok for those cached tokens; Grok stays ahead overall on its cheaper uncached input and output. Opus charges $5.00 per 1M tokens to write the cache, which Grok does not list.
Once a Grok 4.7 prompt reaches 200K tokens, every token in that request is billed at double the rate — input then equals Opus 5.5's $4.00, and output is still below Opus. Anthropic bills Opus 5.5's full 1M window at standard rates. Grok 4.7 cannot take requests beyond 500K tokens.
Anthropic's Batch API halves Opus 5.5's input and output rates, and stacks with caching. xAI offers a Batch API for batch-enabled models with reduced pricing, but its docs don't list a rate on the page we checked — confirm Grok 4.7's batch eligibility on its model page before planning around it.
On standard rates, yes: $2.00 vs $4.00 input and $6.00 vs $20.00 output per 1M tokens. Opus 5.5 has the cheaper cache hit.
Yes. Requests with prompts of 200K tokens or more are billed at double the rate on all tokens. Claude Opus 5.5 has no long-context surcharge.
Claude Opus 5.5, with 1M tokens, versus 500K for Grok 4.7.
How we choose: prices come from each vendor's official pricing page and are re-checked every week. We take no affiliate fees, so rankings aren't for sale.