Claude Opus 4.8

Claude Opus 4.8 is a model you reach through an API — too large to self-host, so this page covers what it does, how to access it, and what to run locally instead.

PARAMETERS
n/a
FORMAT
API
RUNS LOCALLY
No
BEST FOR
Coding, Agentic, Reasoning

You don't run Claude Opus 4.8 locally

Access is through the hosted API.

Anthropic's current flagship and the most capable model for Claude Code. Best-in-class agentic tool use and long-horizon coding. Parameter count undisclosed (cloud API). Cloud only.

Strong local alternatives

Qwen3 235B A22B
235B — runs on one machine
Qwen3.5 122B-A10B Instruct
122B — runs on one machine
DeepSeek-R1 671B
671B — runs on one machine

More Claude models

Claude 3.5 SonnetClaude 3.7 SonnetClaude 3 OpusClaude 4 OpusClaude 4 SonnetClaude Opus 4.7Claude Fable 5

Frequently asked questions

Can I run Claude Opus 4.8 locally?

Not realistically. Claude Opus 4.8 is a vendor-undisclosed-size model; a Q4-class build would need far beyond any consumer machine. The hosted API or a smaller open model is the practical path.

How do I access Claude Opus 4.8?

Through the vendor-hosted API. See the official source linked on this page.

What is the best local alternative to Claude Opus 4.8?

Qwen3 235B A22B is the strongest local model we track (235B). It runs on a single high-memory Mac or GPU; see its page for exact hardware.

Cite this page

ModelFit: Claude Opus 4.8 — specs, memory math and hardware verdicts.
https://modelfit.io/models/claude-opus-4.8/ (dataset updated 2026-09-03, CC BY 4.0).