GLM 5.3 vs GLM 5.3 Flash
API pricing, context window and capabilities for GLM 5.3 and GLM 5.3 Flash, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersGLM 5.3 wins on intelligence.
Price
Tied
Terminal-Bench
Tied
Intelligence
GLM 5.3
Context window
Tied
Key takeaways
who wins on what, from the published numbersGLM 5.3 wins
- Cheaper input ($0.079 vs $0.11 /1M)
- More serving providers (16 vs 13)
GLM 5.3 Flash wins
- Cheaper output ($3.08 vs $0.35 /1M)
Cheaper overall
GLM 5.3 Flash
$0.11 + $0.35 /1M
Larger context
Tied
More providers
GLM 5.3
16 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| GLM 5.3 | GLM 5.3 Flash | |
|---|---|---|
| Input $/1M | $0.079OpenRouter routed quote best | $0.11via Sail |
| Output $/1M | $3.08via Sail | $0.35via Sail best |
| Context window | 1M | 1M |
| Max output | 1M | 1M |
| Serving providers | 16 best | 13 |
| Date | Released Aug 14, 2026 | Released Aug 26, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 | GLM 5.3 Flash | |
|---|---|---|
| Intelligence | 44.8 best | 41.8 |
| Terminal-Bench | 84% | 84% |
| GPQA Diamond | 92% best | 91% |
| Output speed | 62 t/s | 67 t/s best |
| Latency (TTFT) | 3.50s | 2.80s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3
via OpenRouter
$5.20
GLM 5.3 Flash
via Sail
$0.90
Capabilities
feature support, side by side| Feature | GLM 5.3 | GLM 5.3 Flash |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 or GLM 5.3 Flash?
GLM 5.3 is cheaper for input ($0.079 vs $0.11 per 1M tokens) as an OpenRouter routed quote. GLM 5.3 Flash is cheaper for output ($3.08 vs $0.35 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 and GLM 5.3 Flash?
Both GLM 5.3 and GLM 5.3 Flash have about a 1M-token context window.
How do GLM 5.3 and GLM 5.3 Flash compare on benchmarks?
On the tracked benchmarks, they score about the same on Terminal-Bench, and GLM 5.3 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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