Beam 1.0 vs Kimi K2.8 Preview
Comparing Beam 1.0 and Kimi K2.8 Preview across benchmarks, pricing, and capabilities.
Reflection AI · Moonshot AI · Updated for 2026
Which is better?
Beam 1.0 and Kimi K2.8 Preview trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Beam 1.0
- you want the most recent training data — it shipped Oct 2026
- you need open weights you can self-host or fine-tune
Choose Kimi K2.8 Preview
- you are already invested in the Moonshot AI ecosystem
At a glance
The differences that matter most.
Individual benchmarks
22 reported for Beam 1.0 · 0 for Kimi K2.8 Preview
Beam 1.0 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
Both models have the same input context window of 1,048,576 tokens. Only Beam 1.0 specifies output context (131,072 tokens).
Input capabilities
Documented input modalities across available providers
Kimi K2.8 Preview supports multimodal inputs, whereas Beam 1.0 does not.
Kimi K2.8 Preview can handle both text and other forms of data like images, making it suitable for multimodal applications.
Beam 1.0
Kimi K2.8 Preview
License
Usage and distribution terms
Beam 1.0 is licensed under Apache 2.0, while Kimi K2.8 Preview uses a proprietary license.
License differences may affect how you can use these models in commercial or open-source projects.
Apache 2.0
Open weights
Proprietary
Closed source
Release Timeline
When each model was launched
Beam 1.0 was released on 2026-10-16, while Kimi K2.8 Preview was released on 2026-09-11.
Beam 1.0 is 1 month newer than Kimi K2.8 Preview.
Oct 16, 2026
3 days ago
1mo newerSep 11, 2026
1 months ago
Knowledge Cutoff
When training data ends
Beam 1.0 has a documented knowledge cutoff of 2026-06-30, while Kimi K2.8 Preview's cutoff date is not specified.
We can confirm Beam 1.0's training data extends to 2026-06-30, but cannot make a direct comparison without Kimi K2.8 Preview's cutoff date.
Jun 2026
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Provider Availability
Beam 1.0 is available from Together, Reflection AI. Kimi K2.8 Preview is available from Moonshot AI.
Beam 1.0
Kimi K2.8 Preview
Outputs Comparison
Judge for yourself.
Run your own prompts against Beam 1.0 and Kimi K2.8 Preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about Beam 1.0 vs Kimi K2.8 Preview.