AI model comparison
GLM 5.3 Flash vs Kimi K3
Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.
Z.ai
GLM 5.3 Flash
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks.
- Input / 1M
- $0.02
- Output / 1M
- $1.20
- Context
- 1.05M
Moonshot AI
Kimi K3
Kimi K3 is a 2.8T parameter open-weight multimodal reasoning model from Moonshot AI.
- Input / 1M
- $0.73
- Output / 1M
- $10
- Context
- 1.05M
At a glance
Quick verdict
How the two models stack up on the things people ask about most.
Lower price
GLM 5.3 Flash
10.0x cheaper for a typical chat
Higher intelligence score
Kimi K3
43.6 vs 41.8 on Artificial Analysis
Larger context window
Tie
1.05M vs 1.05M tokens
Newer release
GLM 5.3 Flash
Released August 26, 2026
Benchmarks
Benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
Coding index
Agentic index
Pricing
GLM 5.3 Flash vs Kimi K3 API pricing
Per-token API rates. Cheaper option highlighted.
| Metric | ||
|---|---|---|
| Input tokensPer 1M tokens | $0.02 | $0.73 |
| Output tokensPer 1M tokens | $1.20 | $10 |
| Cached input (read)Per 1M tokens | $0.02 | $0.55 |
| Cache writePer 1M tokens | Not available | Not available |
What it costs in practice
Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.
Chat message
2K in, 500 out
Coding task
30K in, 4K out
Long document summary
150K in, 2K out
Specs
Context window and capabilities
How much each model can read, how much it can write, and what it accepts as input.
| Metric | ||
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Max output | 944K tokens | 944K tokens |
| Input types | Image, Text, Video | Image, Text, Video |
| Output types | Text | Text |
| Reasoning effort levels | Max, High, Low | Max, High, Low |
| Default reasoning effort | Max | Max |
| Release date | August 26, 2026 | July 16, 2026 |
Features
Supported features
API features available for each model.
| Metric | ||
|---|---|---|
| Tool calling | Supported | Supported |
| Structured outputs | Supported | Supported |
| JSON mode | Supported | Supported |
| Reasoning | Supported | Supported |
| Temperature | Supported | Supported |
| Stop sequences | Supported | Supported |
| Deterministic seed | Supported | Supported |
| Verbosity control | Not supported | Not supported |
Keep exploring
More on these models
Other head-to-heads, the full model page, and the alternatives list for each model.
- GLM 5.3 Flash vs DeepSeek V4.1 Flash
- GLM 5.3 Flash vs MiMo-V2.6-Flash
- GLM 5.3 Flash vs Step 5 Preview
- GLM 5.3 Flash vs Hy4 preview
- GLM 5.3 Flash vs GPT-6 Luna
- GLM 5.3 Flash vs Claude Opus 5.5
- GLM 5.3 Flash vs DeepSeek V4 Flash 0731
- GLM 5.3 Flash vs GLM 5.3
- GLM 5.3 Flash vs DeepSeek V4 Flash 0423
- GLM 5.3 Flash vs Hy3
- GLM 5.3 Flash vs Claude Sonnet 5.5
- GLM 5.3 Flash vs Muse Spark 1.3 Contributor
- GLM 5.3 Flash vs GPT-6.1 Sol
- GLM 5.3 Flash vs Gemini 3.8 Flash
- GLM 5.3 Flash vs GPT-5.6 Luna
- GLM 5.3 Flash vs GLM 5.2
- GLM 5.3 Flash vs Claude Fable 5.1
- GLM 5.3 Flash vs GPT-6 Astra
- GLM 5.3 Flash vs MiMo-V2.6-Pro
- GLM 5.3 Flash vs Claude Opus 5
- GLM 5.3 Flash vs DeepSeek V4 Pro 0813
- GLM 5.3 Flash vs Claude Haiku 5.5
- GLM 5.3 Flash vs Muse Spark 1.3
- GLM 5.3 Flash vs Grok 4.7
- GLM 5.3 Flash vs Qwen3.8 Max (0902)
- GLM 5.3 Flash vs Grok 4.6
- GLM 5.3 Flash vs Ling 3.1 Flash
- GLM 5.3 Flash vs GPT-5.6 Terra
- GLM 5.3 Flash vs Claude Opus 4.8
- GLM 5.3 Flash vs Claude Opus 4.7
- GLM 5.3 Flash vs Qwen3.8 2.4T A95B
- GLM 5.3 Flash vs Gemini 3.7 Flash
- GLM 5.3 Flash vs Muse Spark 1.2
- GLM 5.3 Flash vs Qwen3.8 Flash
- GLM 5.3 Flash vs Qwen3.8 27B
- GLM 5.3 Flash vs Grok 4.5
- GLM 5.3 Flash vs GPT-6 Luna Pro
- GLM 5.3 Flash vs DeepSeek V4 Flash Vision Exp
- GLM 5.3 Flash vs GLM 5.3 FlashX
- GLM 5.3 Flash vs GPT-5.6 Luna Pro
- Kimi K3 vs Claude Opus 5.5
- Kimi K3 vs Claude Sonnet 5.5
- Kimi K3 vs Claude Fable 5.1
- Kimi K3 vs GPT-6 Astra
- Kimi K3 vs GPT-6.1 Sol
- Kimi K3 vs Claude Opus 5
- Kimi K3 vs Claude Fable 5
- Kimi K3 vs Muse Spark 1.3
- Kimi K3 vs GLM 5.3
- Kimi K3 vs GPT-6 Sol
- Kimi K3 vs GPT-5.6 Sol
- Kimi K3 vs Grok 4.7
- Kimi K3 vs Qwen3.8 Max (0902)
- Kimi K3 vs Grok 4.6
- Kimi K3 vs Gemini 3.8 Flash
- Kimi K3 vs Claude Haiku 5.5
- Kimi K3 vs GPT-5.6 Terra
- Kimi K3 vs Claude Opus 4.8
- Kimi K3 vs Ling 3.1 Flash
- Kimi K3 vs Claude Opus 4.7
- Kimi K3 vs Qwen3.8 2.4T A95B
- Kimi K3 vs Muse Spark 1.2
- Kimi K3 vs GPT-5.4
- Kimi K3 vs GPT-5.5
- Kimi K3 vs Claude Sonnet 5
Our take
GLM 5.3 Flash is 10.0x cheaper for a typical chat. Kimi K3 scores higher on the Artificial Analysis Intelligence Index (43.6 vs 41.8). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.
FAQ
Frequently asked questions
Is GLM 5.3 Flash or Kimi K3 cheaper?
GLM 5.3 Flash is cheaper for a typical chat (2K input tokens and 500 output tokens). GLM 5.3 Flash costs $0.02 per 1M input tokens and $1.20 per 1M output tokens, while Kimi K3 costs $0.73 per 1M input tokens and $10 per 1M output tokens.
Which has a bigger context window, GLM 5.3 Flash or Kimi K3?
GLM 5.3 Flash supports up to 1.05M tokens of context, compared with 1.05M for Kimi K3.
Is GLM 5.3 Flash smarter than Kimi K3?
On the Artificial Analysis Intelligence Index, GLM 5.3 Flash scores 41.8 and Kimi K3 scores 43.6, putting Kimi K3 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.
Can I use GLM 5.3 Flash and Kimi K3 at the same time?
Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see GLM 5.3 Flash and Kimi K3 answer side by side and keep the better response.
Why choose? Ask both.
Send one prompt to GLM 5.3 Flash and Kimi K3 at the same time. Compare the answers side by side and keep the best one.