Grok 4.6 vs Claude Opus 4.8: Full Business Comparison

On August 12, 2026, xAI released Grok 4.6, its latest model for long-running agentic and visual tasks. On xAI's standard API tier, it costs $2 per million input tokens and $6 per million output tokens. Anthropic's Claude Opus 4.8 is a generally available, value-focused coding model that already powers Claude Code. It costs $5 per million input tokens and $25 per million output tokens.

The models differ most in price and maturity. Grok 4.6 is the newer release, with published benchmark leads across several agentic and coding evaluations, and costs roughly a quarter as much per token as Opus 4.8. Opus 4.8, meanwhile, is the more established option, backed by a mature coding tool and documented compliance paperwork.

This page compares their published benchmarks, pricing, coding fit, and compliance to help you choose the right model for your workload, not simply the one making the newest headlines.

Grok 4.6 vs. Claude Opus 4.8: Side-by-Side

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Price: Grok 4.6 Costs Roughly a Quarter of Opus 4.8 per Token

Grok 4.6 is priced at $2 per million input tokens and $6 per million output tokens on the standard API tier, with an optional 'fast' variant at double those rates ($4/$12). Claude Opus 4.8 costs $5 per million input tokens and $25 per million output tokens, a documented and stable price point that has held since its release.

On a like-for-like token basis, Opus 4.8's output price is roughly four times Grok 4.6's. For output-heavy workloads — long reports, generated code, multi-turn agent transcripts — that gap compounds fast. Grok 4.6's price advantage narrows if a workload needs the faster API tier, which doubles both rates.

• Grok 4.6 standard: $2 input / $6 output per million tokens.
• Grok 4.6 fast tier: $4 input / $12 output per million tokens.
• Claude Opus 4.8: $5 input / $25 output per million tokens.

→ Compare per-token pricing for every AI model

Grok 4.6 vs Claude Opus 4.8: What's Actually Published

xAI publishes a broad benchmark set for Grok 4.6: 61 on the AA Intelligence Index (matching GPT-5.6 Sol), 1753 on GDPVal-AA v2, 69.9% on CursorBench v3.2, and 65.9% on DeepSWE v1.1. Anthropic has not published Opus 4.8 scores on that same set as of this writing.

The benchmark Anthropic does publish for Opus 4.8 is SWE-bench Verified, at about 88.6% (Anthropic) — a different coding benchmark than the ones xAI reports for Grok 4.6, so the two scores are not a direct head-to-head. Neither vendor has published a matched, same-suite benchmark run pitting these two exact models against each other.

Until that changes, the more reliable signal for a specific workload is a short pilot on your own coding or agentic tasks rather than cross-referencing scores from different benchmark suites.

• Grok 4.6: 61 AA Intelligence Index, 69.9% CursorBench v3.2, 65.9% DeepSWE v1.1.
• Claude Opus 4.8: ~88.6% SWE-bench Verified.
• No vendor has published a matched, same-suite benchmark for these two models.

Coding and Agentic Fit

Claude Opus 4.8 is a mature, shipping coder — it already powers Claude Code, giving teams a production-ready agentic tool with a track record. Grok 4.6 is newer and centers on long-running agent work: multi-step research, codebase-wide changes, and iterative application builds, with self-testing between steps.

For a team standardizing on one shipping coding assistant today, Opus 4.8's maturity inside Claude Code is the lower-friction pick. For a team running heavier agentic pipelines where output-token cost adds up fast, Grok 4.6's published benchmark scores and much lower per-token price make it worth piloting.

• Opus 4.8: mature agentic coding via the shipping Claude Code tool.
• Grok 4.6: newer, purpose-built for long-running multi-step agent work at a lower per-token cost.

Compliance: Opus 4.8 Has Documented Coverage Today

Claude Opus 4.8 offers SOC 2, ISO 27001 certification, and a HIPAA BAA on the API and Enterprise plans. Grok 4.6 ships with BAA and DPA documentation and an internal/third-party safety testing suite, but xAI's public compliance paperwork is less established than Anthropic's for regulated buyers.

A regulated business evaluating both today should request current SOC 2 and BAA terms directly from xAI before sending sensitive data, since Anthropic's documentation for Opus 4.8 has a longer public track record.

When to Choose Grok 4.6 vs Claude Opus 4.8

Choose Grok 4.6 if your workload is output-token-heavy agentic or multi-step technical work and the lower published per-token price outweighs the value of a longer-proven compliance track record.

Choose Claude Opus 4.8 if you need a mature, shipping coding tool today with documented SOC 2, ISO 27001, and HIPAA BAA coverage, and predictable pricing that has already held steady since release.

How to use Grok 4.6 and Claude Opus 4.8

You do not run hosted models like Grok 4.6 and Claude Opus 4.8 on your own hardware — you reach them through a tool, and the same one can usually drive both. Picking that tool is most of the setup.

The fastest way to put Grok 4.6 and Claude Opus 4.8 to work day to day is inside an AI IDE, and Cursor is the most popular — it supports both directly, so you can be working in minutes. The maker's own option is Claude Code for Claude Opus 4.8, if you want the native experience. Prefer a different editor? Windsurf, Zed, and GitHub Copilot drive these models too.

The Verdict

Grok 4.6 and Claude Opus 4.8 solve different problems at different price points. Grok 4.6 leads on published agentic and coding benchmarks at roughly a quarter of Opus 4.8's per-token cost, but its compliance paperwork is newer and less battle-tested. Opus 4.8 is the proven, shipping option with a mature coding tool and documented enterprise compliance already in place.

Business buyers should weigh workload economics (token volume, output-heavy agentic runs) against how much weight compliance maturity carries for their industry before picking one over the other.

For teams that can pilot both, running a short side-by-side test on real tasks is more reliable than comparing scores pulled from two different benchmark suites.