Kimi K3.1 Pro vs GLM 5.3 FlashX Legal
Detailed technical comparison between Kimi K3.1 Pro (Moonshot AI) and GLM 5.3 FlashX Legal (Zhipu AI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
Tie
Equal CapacityTie
Equal CapabilityTie
Equal SpeedGLM 5.3 FlashX Legal
$0.37 / MTokKimi K3.1 Pro
Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...
GLM 5.3 FlashX Legal
GLM-5.3-FlashX-Legal (GLM-Legal) is Z.ai's legal-domain variant of GLM-5.3-FlashX, a native multimodal model that accepts text, image, and video input and produces text. It adds legal-domain mid-training and post-training with reinforcement...
Technical Specifications
🏆 = Superior Spec| Specification | Kimi K3.1 Pro | GLM 5.3 FlashX Legal |
|---|---|---|
| Provider | Moonshot AI | Zhipu AI |
| Context Window | 1,048,576 tokens | 1,048,576 tokens |
| Agent Suitability | Not yet benchmarked | Not yet benchmarked |
| Time to First Token (TTFT) | No public TTFT data | No public TTFT data |
| Deployment Model | managed api | managed api |
| Production Stability | Not verified | Not verified |
| API Available | Yes | Yes |
| Released Date | 2026-10-23 | 2026-11-02 |
API Pricing Comparison
Input Price per Million Tokens
Kimi K3.1 Pro
$2.00
GLM 5.3 FlashX Legal
$0.37
Output Price per Million Tokens
Kimi K3.1 Pro
$10.00
GLM 5.3 FlashX Legal
$1.25
💡 Cost Ratio: GLM 5.3 FlashX Legal is 5.4x cheaper per input token than Kimi K3.1 Pro.
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Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
Kimi K3.1 Pro Quirks & Gotchas
No developer gotchas reported.
GLM 5.3 FlashX Legal Quirks & Gotchas
No developer gotchas reported.
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