Claude 3 Opus vs Kimi K2.8 Preview
Comparing Claude 3 Opus and Kimi K2.8 Preview across benchmarks, pricing, and capabilities.
Anthropic · Moonshot AI · Updated for 2026
Which is better?
Claude 3 Opus and Kimi K2.8 Preview trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
Kimi K2.8 Preview also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude 3 Opus
- you want predictable pricing at $15.00/M input and $75.00/M output
Choose Kimi K2.8 Preview
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Sep 2026
At a glance
The differences that matter most.
Individual benchmarks
11 reported for Claude 3 Opus · 0 for Kimi K2.8 Preview
Claude 3 Opus and Kimi K2.8 Previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Human preference
Blind head-to-head votes and playground preference scores
Context Window
Maximum input and output token capacity
Kimi K2.8 Preview accepts 1,048,576 input tokens compared to Claude 3 Opus's 200,000 tokens. Only Claude 3 Opus specifies output context (200,000 tokens).
Input capabilities
Documented input modalities across available providers
Both Claude 3 Opus and Kimi K2.8 Preview support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude 3 Opus
Kimi K2.8 Preview
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Claude 3 Opus was released on 2024-02-29, while Kimi K2.8 Preview was released on 2026-09-11.
Kimi K2.8 Preview is 31 months newer than Claude 3 Opus.
Feb 29, 2024
2.5 years ago
Sep 11, 2026
3 days ago
2.5yr newerKnowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude 3 Opus is available from Anthropic, Bedrock, Google. Kimi K2.8 Preview is available from Moonshot AI.
Claude 3 Opus
Kimi K2.8 Preview
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude 3 Opus and Kimi K2.8 Preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude 3 Opus vs Kimi K2.8 Preview.