K2 Think Models by MBZUAI
1 model2026Up to 512k ctx
Last refreshed 2026-06-29. Next refresh: weekly.
About
MBZUAI's K2 Think series of open-source reasoning-focused large language models, developed in collaboration with G42 and Cerebras Systems. Built on the K2 base model family, K2 Think models are optimized for deep multi-step reasoning across math, science, coding, and logic, with long-context support.
Decision facts
- Best fit
- codingmath-heavy prompts
- Capability starting point
- K2 Think V2 with 512k context
- Lowest tracked input
- Not tracked
- Closest related family
- Claude 3
Current Variants
Use-when guidance is based on each model's tracked capabilities, context window, release date, and replacement status.
1 in view
K2 Think V2Current
Use when the workload needs 512k context and 70B parameters.
2026-01512k context70B parameters
| Model | Use when | Released | Signals | Status |
|---|---|---|---|---|
| K2 Think V2 | Use when the workload needs 512k context and 70B parameters. | 2026-01 | 512k context70B parameters | Current |
Release Timeline
1 release group2026-01
1 current
K2 Think V2
Current512k context70B parameters
Specifications(1 models)
| Model | Released | Context | Parameters |
|---|---|---|---|
| K2 Think V2 | 2026-01 | 512k | 70B |