Best LLMs for Long-Context Reasoning — Z.ai
The best Z.ai model for reasoning over long inputs is GLM 5.2, scoring 71.3% on long-context reasoning — a different question from how large a window it accepts. GLM 4.7 (64.0%) and GLM 5 (63.3%) round out the top three.
- 1
glm-5.2ReasoningToolsJSON51.1 intel · $0.760/M · 156 t/s71.3%LCR - 2glm-4.7ReasoningToolsJSON33.7 intel · $0.400/M · 496 t/s64.0%LCR
- 3glm-5ReasoningToolsJSON39.5 intel · $0.950/M · 205K ctx63.3%LCR
- 4glm-5.1ReasoningToolsJSON40.2 intel · $0.966/M · 205K ctx62.3%LCR
- 5glm-5v-turboReasoningToolsJSON+134.5 intel · $1.20/M · 203K ctx61.0%LCR
- 6glm-5-turboReasoningToolsJSON38.1 intel · $1.20/M · 203K ctx60.7%LCR
- 7glm-4.5ReasoningToolsJSON19.5 intel · $0.600/M · 131K ctx48.3%LCR
- 8glm-4.5-airReasoningTools16.5 intel · $0.130/M · 131K ctx43.7%LCR
- 9glm-4.7-flashReasoningToolsJSON22.9 intel · $0.060/M · 43 t/s35.0%LCR
- 10glm-4.6ReasoningToolsJSON23.0 intel · $0.500/M · 205K ctx26.3%LCR
- 11glm-4.6vReasoningToolsJSON+111.0 intel · $0.300/M · 33 t/s12.3%LCR
- 12glm-4.5vReasoningToolsJSON+17.0 intel · $0.600/M · 66K ctx0.0%LCR
How this is ranked
AI models ranked by LCR — reasoning accuracy over long inputs, not just the size of the window they accept. A large context window is a capacity claim; this is the measurement of whether the model can still reason over information buried deep inside it. Pair it with the longest-context ranking, which sorts on raw window size.
Frequently asked
Which Z.ai model reasons best over long inputs?
The best Z.ai model for reasoning over long inputs is GLM 5.2, scoring 71.3% on long-context reasoning — a different question from how large a window it accepts. GLM 4.7 (64.0%) and GLM 5 (63.3%) round out the top three.
What's a good alternative to GLM 5.2?
GLM 4.7 (64.0%) is the closest alternative on this metric, followed by GLM 5 (63.3%). See the full ranking above for the tradeoffs.
How many Z.ai models are there?
modelgrep tracks 12 Z.ai models with live benchmarks, speed, latency and per-provider pricing, led on intelligence by GLM 5.2. 12 of them qualify for this ranking.