Z.ai: GLM 5.1 vs Google: Gemma 4 31B (free)
Head-to-head API cost, context, and performance comparison. Synced at 10:07:23 PM.
Executive Summary
When evaluating Z.ai: GLM 5.1 against Google: Gemma 4 31B (free), the pricing structure is a key differentiator. Google: Gemma 4 31B (free) is approximately 100% more cost-effective per 1 million tokens overall. In fact, it is currently available for free inference, though developers should be mindful of potential rate limits or stability changes common with zero-cost or preview tiers.
However, when looking at raw reasoning capabilities, Google: Gemma 4 31B (free) leads with a statistical ELO score of 1439. For tasks involving complex logic, coding, or instruction-following, developers might prefer Google: Gemma 4 31B (free), which is especially appealing given its zero-cost tier.
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Raw Technical comparison
Verdict
If you are looking for pure performance and capability, Google: Gemma 4 31B (free) is statistically superior. However, if API burn rate is the primary concern, Google: Gemma 4 31B (free) wins out aggressively in pricing.
People Also Ask
Is Z.ai: GLM 5.1 cheaper than Google: Gemma 4 31B (free)?
No. Google: Gemma 4 31B (free) is the more cost-effective model, operating at a lower price point per 1 million tokens.
Which model has the larger context window?
The Google: Gemma 4 31B (free) model has the advantage in memory, offering a massive 262,144 token limit for document ingestion.