Grok 4.1 Fast (Reasoning) vs Grok Code Fast 1 vs GLM-4.6V-Flash

Grok 4.1 Fast (Reasoning) is the better all-round choice, scoring 69/100 against GLM-4.6V-Flash (63) and Grok Code Fast 1 (48). It leads on context window. GLM-4.6V-Flash wins on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.

GLM-4.6V-Flash is cheaper at $0.161 input / $0.559 output per million tokens (median across 2 API providers; free on Z.AI). Grok 4.1 Fast (Reasoning) costs $0.20 input / $0.50 output per million tokens (median across 7 API providers); Grok Code Fast 1 costs $0.20 input / $1.50 output per million tokens (median across 5 API providers). At a typical mix of three input tokens to one output token, that is $0.261 per million tokens for GLM-4.6V-Flash versus $0.275 for Grok 4.1 Fast (Reasoning) (1.1× as much) and $0.525 for Grok Code Fast 1 (2× as much).

There is no independent benchmark that covers all three models yet. Grok 4.1 Fast (Reasoning) has not been scored yet, Grok Code Fast 1 has not been scored yet and GLM-4.6V-Flash has not been scored yet.

There are no published SWE-bench Verified results for Grok 4.1 Fast (Reasoning), Grok Code Fast 1 and GLM-4.6V-Flash yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.

Grok 4.1 Fast (Reasoning) has the largest context window at 2,000,000 tokens, against 256,000 for Grok Code Fast 1 and 128,000 for GLM-4.6V-Flash. Maximum output per response: Grok 4.1 Fast (Reasoning) up to 30,000, Grok Code Fast 1 up to 10,000, GLM-4.6V-Flash up to 32,768 tokens.

Grok 4.1 Fast (Reasoning) accepts text and images; Grok Code Fast 1 accepts text; GLM-4.6V-Flash accepts text, images and video. GLM-4.6V-Flash handles the widest range of inputs.

GLM-4.6V-Flash publishes its weights and can be self-hosted; Grok 4.1 Fast (Reasoning) and Grok Code Fast 1 is proprietary.

GLM-4.6V-Flash is the newest, released Dec 8, 2025. Grok 4.1 Fast (Reasoning) came out Nov 19, 2025; Grok Code Fast 1 came out Sep 2, 2025.

Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.