Kimi K3 is the best model ever made (sometimes)

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The video reviews Kimi K3, an open-weight AI model, highlighting its performance in coding and reasoning tasks, its advanced architecture, and its competitive pricing. It also discusses limitations and practical considerations for users.

Kimi K3 is a highly competitive open-weight AI model, excelling in coding and reasoning tasks, offering a good balance of performance and cost, and demonstrating strong multimodal capabilities, though it has some limitations in user experience and requires significant hardware for optimal performance.

• Claude Fable 5

  Kimi K3 is cheaper and performs better on some metrics, but Fable 5 offers a better user experience.

• GPT-5.6 Sol

  Kimi K3 is cheaper and performs better on some metrics, but GPT-5.6 Sol excels in reasoning.

• Opus 4.8

  Kimi K3 is significantly cheaper than Opus 4.8 on a cost-per-task basis, though more expensive than other open-weight peers.

• Kimi K3 Intelligence Score

  Kimi K3 scores 57 on the Artificial Analysis Intelligence Index, placing it behind Fable 5 and GPT-5.6 Sol but ahead of Opus 4.8 and GPT-5.5.

  • Kimi K3 scores 57 on the Artificial Analysis Intelligence Index.
  • Intelligence is comparable to Opus 4.8 and GPT-5.5 but remains behind Fable 5 and GPT-5.6 Sol.
• Kimi K3 Parameter Count

  Moonshot AI has plans to release the 2.8T parameter model's weights, which would make it the leading open weights model.

  • Moonshot AI has expressed plans to release the 2.8T parameter model's weights, which would make it the leading open weights model.
• Kimi K3 Performance vs. Open Weights Peers

  Kimi K3 significantly outperforms other open weights models in the Intelligence Index, despite being more expensive.

  • Kimi K3 would clearly lead other open weights models including GLM-5.2 (51) and DeepSeek V4 Pro (44), however, at 2.8T parameters, it is significantly larger than its open weights peers (eg. GLM-5.2 at 753B params and DeepSeek V4 Pro at 1.6T), as well as the Kimi K2 to K.6 models (1T params).
• Kimi K3 Cost vs. Performance

  Kimi K3 offers a competitive cost per task, similar to GPT-5.6 Sol and cheaper than Opus 4.8, positioning it favorably against open weights peers.

  • Cost per task ($0.94) is similar to GPT-5.6 Sol ($1.04), ~1/2 the price of Opus 4.8 ($1.80) and higher than open weights peers.
  • This positions the model as cheaper on a cost per task basis than Opus 4.8, similar to GPT-5.6 Sol ($1.04) and more expensive than open weights peers, GLM-5.2 ($0.32) and DeepSeek V4 Pro ($0.04).
• Kimi K3 Multimodality

  Kimi K3 possesses native multimodal capabilities, allowing it to process image and text input, and is positioned as a leading open weights model with these capabilities.

  • Native multimodal capabilities: Kimi K3, like K2.6, is released with native image and text multimodal input.
  • If weights are released, this will position Kimi K3 as one of the leading open weights models with multimodal input capabilities.
• Kimi K3 Deployment

  Kimi K3 can be deployed through subscription (kimi.com) or API access (platform.kimiai).

  • Kimi K3 is available today on kimi.com, Kimi Work, Kimi Code, and the Kimi API.
  • At launch, Kimi K3 will use max thinking effort by default, with low- and high-effort modes to be introduced in subsequent updates.

• 0:59 Introduction of Kimi K3 as a powerful open-weight AI model, highlighting its strengths in coding and reasoning tasks.
• 25:08 Explanation of Kimi K3's architecture: Delta Attention (KDA) and Attention Residuals (AttnRes) with a Mixture of Experts (MoE) framework for efficient scaling.
• Presentation of benchmark results from various sources (DeepSWE, FrontierSWE, Kimi Code Bench 2.0, etc.) showing Kimi K3's competitive performance, especially in coding.
• Comparison of Kimi K3's performance and cost-effectiveness against leading open and closed-weight models.
• Discussion of Kimi K3's multimodal capabilities, including native image and text input, and its potential for future developments.
• Overview of Kimi K3's pricing models: subscription via kimi.com and API access via platform.kimiai.
• Showcase of Kimi K3's application in game development and digital creation, demonstrating its 3D reasoning, coding, and vision capabilities.
• Overview of the chip design K3 built for nano model, highlighting its performance and efficiency.
• Discussion of K3's coding performance, including its ability to handle long-horizon tasks and its use of screenshots and visuals.
• Analysis of K3's performance on benchmarks like the AA-Omniscience Index, showing strong results in intelligence and speed but trailing in cost per task compared to some peers.
• Mention of K3's limitations, including excessive proactiveness and a gap in user experience compared to closed models.
• Concluding remarks on Kimi K3's strengths and potential, highlighting its strong performance and competitive pricing.