GLM 5.1 vs GLM 5.2

This comparison does not currently contain a protocol-matched coding benchmark for both GLM 5.1 and GLM 5.2, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

GLM 5.1 is $1.05 and GLM 5.2 is $0.75 per million tokens, so GLM 5.2 is cheaper on this metric. GLM 5.1 is $3.50 and GLM 5.2 is $2.40 per million tokens, so GLM 5.2 is cheaper on this metric.

GLM 5.2 has the larger sourced context window. GLM 5.1 supports 202,752 tokens and GLM 5.2 supports 1,048,576 tokens.

There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.

Both models have the same sourced self-hosting status: supported. GLM 5.1 is open weight; GLM 5.2 is open weight.

GLM 5.1 is not documented with image input; GLM 5.2 is not documented with image input. This reflects supported input modalities, not vision quality.

Neither model has a sourced maximum output in this comparison, so a larger limit cannot be determined.

GLM 5.1: reasoning and tool calling. GLM 5.2: reasoning and tool calling. Feature support does not establish relative quality.

GLM 5.1 has 4 sourced provider routes; GLM 5.2 has 5, so GLM 5.2 has broader tracked availability.

There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.