GLM 5.3 Flash vs Kimi K3
API pricing, context window and capabilities for GLM 5.3 Flash and Kimi K3, 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 Flash wins on price. Kimi K3 wins on Terminal-Bench and on intelligence.
Price
GLM 5.3 Flash
Terminal-Bench
Kimi K3
Intelligence
Kimi K3
Context window
Tied
Key takeaways
who wins on what, from the published numbersGLM 5.3 Flash wins
- Cheaper input ($0.11 vs $0.70 /1M)
- Cheaper output ($0.35 vs $12.50 /1M)
Kimi K3 wins
- More serving providers (13 vs 14)
Cheaper overall
GLM 5.3 Flash
$0.11 + $0.35 /1M
Larger context
Tied
More providers
Kimi K3
14 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 Flash | Kimi K3 | |
|---|---|---|
| Input $/1M | $0.11via Sail best | $0.70OpenRouter routed quote |
| Output $/1M | $0.35via Sail best | $12.50via Sail |
| Context window | 1M | 1M |
| Max output | 1M | 1M |
| Serving providers | 13 | 14 best |
| Date | Released Aug 26, 2026 | Released Jul 16, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 Flash | Kimi K3 | |
|---|---|---|
| Intelligence | 41.8 | 43.6 best |
| Terminal-Bench | 84% | 85% best |
| GPQA Diamond | 91% | 94% best |
| Output speed | 67 t/s best | 45 t/s |
| Latency (TTFT) | 2.80s best | 3.17s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3 Flash
via Sail
$0.90
Kimi K3
via OpenRouter
$19
Capabilities
feature support, side by side| Feature | GLM 5.3 Flash | Kimi K3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or Kimi K3?
GLM 5.3 Flash is cheaper for input ($0.11 vs $0.70 per 1M tokens) from Sail. GLM 5.3 Flash is cheaper for output ($0.35 vs $12.50 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 Flash and Kimi K3?
Both GLM 5.3 Flash and Kimi K3 have about a 1M-token context window.
How do GLM 5.3 Flash and Kimi K3 compare on benchmarks?
On the tracked benchmarks, Kimi K3 leads on Terminal-Bench, and Kimi K3 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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