Gemma 4 31B IT vs GLM-5.3-Flash vs Qwen3.5 Flash

GLM-5.3-Flash is the better all-round choice, scoring 80/100 against Qwen3.5 Flash (75) and Gemma 4 31B IT (69). It leads on capability and inputs & features. Qwen3.5 Flash wins on price. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.

Qwen3.5 Flash is cheaper at $0.10 input / $0.40 output per million tokens (official Alibaba API price). Gemma 4 31B IT costs $0.14 input / $0.40 output per million tokens (median across 30 API providers); GLM-5.3-Flash costs $0.15 input / $0.50 output per million tokens (official Z.AI API price). At a typical mix of three input tokens to one output token, that is $0.175 per million tokens for Qwen3.5 Flash versus $0.205 for Gemma 4 31B IT (1.2× as much) and $0.237 for GLM-5.3-Flash (1.4× as much).

GLM-5.3-Flash scores higher on the Capabilities Index (ECI): GLM-5.3-Flash 151.9 (#42 of 148), Qwen3.5 Flash 144.0 (#82 of 148) and Gemma 4 31B IT 142.8 (#86 of 148). Their confidence ranges do not overlap (149.4–154.3 vs 141.6–145.5), so the gap is a real one. On individual benchmarks: GPQA Diamond — GLM-5.3-Flash 90.2%, Qwen3.5 Flash 82.3%, Gemma 4 31B IT 75.8%; OTIS Mock AIME 2024–2025 — GLM-5.3-Flash 93.9%, Qwen3.5 Flash 84.4%, Gemma 4 31B IT 73.3%.

There are no published SWE-bench Verified results for Gemma 4 31B IT, GLM-5.3-Flash and Qwen3.5 Flash yet, so there is no like-for-like coding score. On overall capability, GLM-5.3-Flash leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.

GLM-5.3-Flash and Qwen3.5 Flash have the largest context windows (1,000,000 and 1,000,000 tokens), against 262,144 for Gemma 4 31B IT. Maximum output per response: Gemma 4 31B IT up to 32,768, GLM-5.3-Flash up to 131,072, Qwen3.5 Flash up to 65,536 tokens.

Gemma 4 31B IT accepts text and images; GLM-5.3-Flash accepts text, images, PDFs and video; Qwen3.5 Flash accepts text, images and video. GLM-5.3-Flash handles the widest range of inputs.

Gemma 4 31B IT and GLM-5.3-Flash publishes its weights and can be self-hosted; Qwen3.5 Flash is proprietary.

GLM-5.3-Flash is the newest, released Aug 26, 2026. Gemma 4 31B IT came out Apr 2, 2026; Qwen3.5 Flash came out Feb 23, 2026.

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 Oct 4, 2026.