Claude Opus 4.8 Benchmarks, Rankings and Pricing

There is no Claude Opus 4.8 model with published benchmark scores or official pricing: Anthropic has not announced a model by that name. The closest relevant release is Claude Opus 4.1, announced in August 2025, so rankings or prices attributed to “Opus 4.8” should be treated as a naming error or an unverified claim.

What “Claude Opus 4.8” refers to

Claude model names can be easy to mix up: “Opus” is a model family, while the number identifies a model generation or release. Anthropic’s published Opus releases include Claude Opus 4 and Claude Opus 4.1; the company did not identify an Opus 4.8 model in its public announcements or model documentation available at the time of writing.

That distinction matters because a model label is not itself evidence of a new release. Search results, benchmark tables, social posts, or third-party listings may contain typos, unofficial predictions, or confusion between a version number and another product detail. Check the exact model name against Anthropic’s own model documentation before relying on a score, API identifier, or price.

Published benchmark context

Claude Opus 4.1 was presented as an update to Opus 4, with improvements emphasized in areas such as coding, agentic tasks, and instruction following. Anthropic published results for selected evaluations in its announcement, but those figures describe Opus 4.1—not an “Opus 4.8” model. The evaluations include software-engineering and reasoning tasks, and their numbers should not be transferred to a model with a different or nonexistent name.

A benchmark score is meaningful only alongside its test conditions. Results can vary according to the benchmark version, prompt format, tools available, number of attempts, scoring method, and whether the model is evaluated with extra computation. A score from one coding test cannot establish that a model is best overall, and a small difference may not predict a noticeable improvement in everyday work.

• SWE-bench Verified: evaluates attempts to resolve real software issues drawn from code repositories. Results depend on the agent setup and how patches are tested.
• Terminal-Bench: tests tasks performed through a command-line environment. Tool access and task setup affect comparisons.
• GPQA Diamond: assesses difficult, graduate-level multiple-choice questions in science. It measures a narrow kind of knowledge and reasoning.
• Humanity’s Last Exam: is a challenging collection of questions across fields. A score does not measure every practical skill or the reliability of every answer.

When checking any claimed ranking, look for a direct evaluation source, the date, exact model identifier, and complete test setup. Leaderboards may mix API models, preview versions, or differently configured systems. If those details are missing, the ranking is not a dependable basis for choosing a model.

How Opus 4.1 compares with Opus 4

Opus 4.1 was described by Anthropic as a refinement of Opus 4 rather than a model called 4.8. The practical comparison is therefore between the documented Opus releases. Anthropic highlighted coding and agent workflows for the update; independent users may find the difference depends on their prompts, codebase, tool integrations, and task difficulty.

There is no single universal “rank.” One system can lead on a coding leaderboard but trail on a knowledge test or cost-adjusted workload. Rankings also change as providers update models and evaluators revise tests. For a fair comparison, use the same representative tasks, instructions, tools, and success criteria for each candidate.

For example, a developer choosing a model for repository fixes should test whether it can reproduce a bug, make a minimal change, run relevant tests, and explain the patch. A team using a model for document analysis should measure accuracy on its own documents and check how often a person must correct the output. Those results can be more useful than a general leaderboard position.

Pricing: API, subscription and usage

Because Opus 4.8 is not an official model name, it has no verified Anthropic price. Pricing should be checked against the exact model listed in Anthropic’s current API pricing page or the relevant Claude plan page. Rates can change, and a price quoted for Opus 4 or Opus 4.1 must not be presented as the price of “Opus 4.8.”

API billing commonly depends on token usage, with separate rates for input and output tokens; some services may also have distinct treatment for features such as prompt caching or batch processing. A token is a piece of text, not necessarily a whole word. A long prompt, retrieved documents, and a lengthy response can therefore use substantially more tokens than a short question-and-answer exchange.

Claude subscription plans and API access are separate purchasing routes. A subscription provides access under its plan’s terms and limits; it is not simply a prepaid API balance. Before estimating costs, identify the exact model, the product route, expected input and output volume, and any applicable usage limits. Always consult current official pricing rather than relying on an old comparison page.

How to verify a model and its score

Use this quick check before acting on a claim about Opus 4.8:

1. Look for an announcement or model listing on Anthropic’s official site.
2. Confirm the precise API model identifier, not just a shortened name in a screenshot.
3. Find the original benchmark report and check its date, version, and evaluation setup.
4. Compare the score with results for the same test and comparable tool access.
5. Open the current pricing page and match the listed rate to the exact model and product.

A particularly common misconception is that a model with a larger number must exist or must be newer. Versions are assigned by the provider, not inferred from a number seen in a post. Another is that a benchmark ranking guarantees better results for every user; task-specific testing is needed to assess fit, reliability, and cost.

Frequently Asked Questions

Has Claude Opus 4.8 been released?
Anthropic has not announced a Claude model named Opus 4.8 in its public model information available at the time of writing. Check Anthropic’s official announcements for any later release.

What are Claude Opus 4.8’s benchmark scores?
There are no verified scores for that model name. Published Opus 4.1 or Opus 4 results belong to those models and should not be relabeled as Opus 4.8 results.

Where does Claude Opus 4.8 rank?
No reliable ranking can be assigned to an unannounced model. For a real model, compare dated results from the same benchmark and verify the evaluation setup.

How much does Claude Opus 4.8 cost?
There is no official price for Opus 4.8. Check Anthropic’s current API or subscription pricing for the exact model name you intend to use.

Could “Opus 4.8” mean Claude Opus 4.1?
It may be a typo or mistaken reference, but that cannot be assumed. Confirm the model identifier with the person, website, or service making the claim.

How should I choose between Claude models?
Start with current official model names and prices, then test candidates on a small set of representative tasks. Compare correctness, consistency, latency, tool use, and total usage cost—not just one headline score.

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