Which is better for coding — GLM-4.5 or Step-3.5-Flash?

Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.

Which model is cheaper — GLM-4.5 or Step-3.5-Flash?

Step-3.5-Flash is cheaper for input: $0.10 per 1M tokens vs $0.60.

Which has a larger context window — GLM-4.5 or Step-3.5-Flash?

GLM-4.5 supports a larger context: 131,072 tokens vs 65,536.

GLM-4.5 vs Step-3.5-Flash: Specs & Benchmark Comparison

Characteristic	GLM-4.5	Step-3.5-Flash
Company	Zhipu AI	StepFun
Release Date	July 27, 2025	February 1, 2026
Parameters	355B	196B
Multimodal	No	Yes
Context (input)	131K	66K
Context (output)	98K	8K
Input Price / 1M	$0.60	$0.10
Output Price / 1M	$2.20	$0.40
Average Score	0.8	0.8

Verdict

Step-3.5-Flash leads in 2 out of 4 comparison categories.

Overall Performance

Both models show comparable average scores: GLM-4.5 — 0.8, Step-3.5-Flash — 0.8.

API Cost

Step-3.5-Flash is 5.6x cheaper: input $0.10/1M vs $0.60/1M tokens.

Context Window

GLM-4.5 supports a larger context: 131K vs 66K tokens.

Recency

Step-3.5-Flash is newer: released 2/1/2026 vs 7/27/2025.

More About These Models

GLM-4.5

Zhipu AI — specs, benchmarks, API

Step-3.5-Flash

StepFun — specs, benchmarks, API

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GLM-4.5 vs GLM-5 GLM-4.5 vs GLM-4.7-Flash DeepSeek-V3.2-Exp vs GLM-4.5 GLM-4.5 vs LongCat-Flash-Thinking DeepSeek-V3.2 (Thinking) vs GLM-4.5 GLM-4.5 vs MiMo-V2-Flash

All model comparisons →

The GLM-4.5 and Step-3.5-Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-4.5 or Step-3.5-Flash page. See also the complete list of AI model comparisons.