Pairwise benchmark snapshot · Aug 16, 2026
In this head-to-head showdown, GLM-5.3 delivers higher overall intelligence and human-preferred responses (Elo 1,558 vs 1,295), while GLM-5.3 leads in SWE-bench software engineering benchmarks (76.4%), while Gemini 2.5 Flash is more budget-friendly at $0.4/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
9 direct benchmark disciplines evaluated across capability, speed, and cost
Previous Google speed workhorse.
Z.ai Aug 14 2026 post-train of the GLM-5.2 744B base. Coding-plan live; open weights promised after a two-week safety review (z.ai/blog/glm-5.3).
Currently comparing Gemini 2.5 Flash vs GLM-5.3. Alternative family tiers available.
Δ 263 Arena Elo pts
185 tok/s
$0.4 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top Western standard models with China's leading frontier rival across 6 skill dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | Gemini 2.5 Flash | GLM-5.3 | Advantage Delta |
|---|---|---|---|
| Preference Elo | +263 | ||
| Coding Elo | — | — | |
| LiveBench | +19.4% | ||
| SWE-bench | +28.4% | ||
| GPQA Diamond | +15% | ||
| Time to first token | +145 ms | ||
| Output speed | 185 tok/s | 90 tok/s | +95 tok/s |
| Input price | $0.1/1M | +$0.4/1M | |
| Output price | $0.4/1M | +$1.4/1M | |
| Context window | +800k |
Simulate monthly production API costs in USD (US Dollar).
Gemini 2.5 Flash is estimated to save $35.00/month ($420/year).
Higher SWE-bench (76.4%).
Lower output list price ($0.4/1M).
Lower TTFT (110 ms).
Larger window (1M).
Both accept images. Defaulting to the higher-Elo side (GLM-5.3).
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | GLM-5.3 | Higher SWE-bench (76.4%). |
| High-volume chat | Gemini 2.5 Flash | Lower output list price ($0.4/1M). |
| Voice / low-latency UI | Gemini 2.5 Flash | Lower TTFT (110 ms). |
| Long-document RAG | Gemini 2.5 Flash | Larger window (1M). |
| Screenshots / vision | GLM-5.3 | Both accept images. Defaulting to the higher-Elo side (GLM-5.3). |
Coding-plan live; open weights promised after a two-week safety review. Newest Zhipu row.
Strong Chinese/English coding. 5.3 is the new row; 5.2 stays so the delta is visible.
Useful as a cheap historical compare. 3.7 Flash is the 2026 volume SKU.
No comments posted on this matchup yet. Be the first to share an evaluation note!
Dynamic OpenGraph banner generated at /compare/gemini-2-5-flash-vs-glm-5-3/opengraph-image
Verified Head-to-Head Telemetry
