Claude Opus 4.7 vs Grok 4.5: price, scores, context

Side-by-side comparison

Criterion	Claude Opus 4.7	Grok 4.5
Developer	Anthropic	xAI
Released	April 16, 2026	July 8, 2026
Capability index	83.3 / 100	79.1 / 100
Input price	$5	$2
Output price	$25	$6
Cost of a typical task	$0.15	$0.052
Context window	1,000,000 tokens	500,000 tokens
Maximum output	128,000 tokens	500,000 tokens
Reasoning mode	Yes	Yes
Tool calling	Yes	Yes
Accepted inputs	text, image, PDF	text, image, PDF
Open weights	No	No
Knowledge cutoff	January 31, 2026	Not disclosed

The match-up at a glance

This comparison pits two mid-range models, balancing quality and cost against each other: Claude Opus 4.7 and Grok 4.5, one from Anthropic, the other from xAI. The first dates from April 16, 2026, the second from July 8, 2026.

All figures below come from public sources checked on October 22, 2026: models.dev and OpenRouter for prices and capabilities, Epoch AI for scores.

Which one is more capable?

On our capability index, Claude Opus 4.7 scores 83.3 out of 100 and Grok 4.5 79.1. Claude Opus 4.7 leads by 4.2 points.

On the 5 benchmarks reported for both, Claude Opus 4.7 wins 1 time and Grok 4.5 3:

GPQA Diamond (PhD-level science questions): Claude Opus 4.7 90.2%, Grok 4.5 93.4%
OTIS Mock AIME (competition mathematics problems): Claude Opus 4.7 97.8%, Grok 4.5 97.8%
FrontierMath (very hard research-level mathematics): Claude Opus 4.7 70.2%, Grok 4.5 57.2%
FrontierCode (advanced programming tasks): Claude Opus 4.7 38.5%, Grok 4.5 42.4%
APEX-Agents (professional tasks carried out by an agent): Claude Opus 4.7 49.2%, Grok 4.5 56.2%

Which one costs less?

Claude Opus 4.7 costs $5 per million input tokens and $25 per million output tokens; Grok 4.5 costs $2 and $6.

For a typical agent task (read 20,000 tokens, write 2,000), expect $0.15 with Claude Opus 4.7 versus $0.052 with Grok 4.5. Grok 4.5 is 2.9 times cheaper, a gap that adds up quickly over 1,000 tasks: $98 difference.

Run the numbers with your own volumes in the agent cost calculator.

Context and capabilities

Claude Opus 4.7 reads more in one go: 1,000,000 tokens of context (roughly 1,500 pages), versus 500,000 for Grok 4.5.

Reasoning mode: Claude Opus 4.7 yes, Grok 4.5 yes. Tool calling: Claude Opus 4.7 yes, Grok 4.5 yes. Image input: Claude Opus 4.7 yes, Grok 4.5 yes.

Neither publishes its weights: both are used through an API.

In short

Our reading of the data:

Choose Claude Opus 4.7 for a higher capability index and a larger context window.
Choose Grok 4.5 for a lower cost and a more recent release.

This verdict relies on public figures; it does not replace a trial on your own tasks.

Frequently asked questions

Claude Opus 4.7 or Grok 4.5: which is better?

On our index (Epoch AI data), Claude Opus 4.7 scores 83.3 and Grok 4.5 79.1 out of 100. The best choice also depends on price and on your use case.

Which one is cheaper?

Grok 4.5. To read 20,000 tokens and write 2,000, expect $0.15 with Claude Opus 4.7 and $0.052 with Grok 4.5 (prices as of October 22, 2026).

Which one has the larger context window?

Claude Opus 4.7, with 1,000,000 tokens versus 500,000.

Can I run Claude Opus 4.7 or Grok 4.5 on my own servers?

No: both are closed models, available through an API.

Claude Opus 4.7 versus Grok 4.5