Bonsai 4B vs GLM 5.1

This comparison does not currently contain a protocol-matched coding benchmark for both Bonsai 4B and GLM 5.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Only GLM 5.1 has a directly sourced input price: $1.05 per million tokens. Only GLM 5.1 has a directly sourced output price: $3.50 per million tokens.

GLM 5.1 has the larger sourced context window. Bonsai 4B supports 33K and GLM 5.1 supports 203K.

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 recorded self-hosting status: supported. Bonsai 4B is open weight; GLM 5.1 is open weight.

Bonsai 4B is not documented with image input; GLM 5.1 is not documented with image input. This reflects supported input modalities, not vision quality.

Neither has a larger sourced maximum output. Bonsai 4B is — and GLM 5.1 is —.

Bonsai 4B: none of these features are definitively sourced. GLM 5.1: reasoning and tool calling. Feature support does not establish relative quality.

Bonsai 4B has 0 sourced provider routes; GLM 5.1 has 4, so GLM 5.1 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.