GLM 5.3 Prime vs Grok 4.20 0309 Reasoning
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Grok 4.20 0309 Reasoning is 2.8× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix.
| GLM 5.3 Prime | Grok 4.20 0309 Reasoning | |
|---|---|---|
| Input price / 1M | $2.80 | $1.25 |
| Output price / 1M | $8.80 | $2.50 |
| Blended price (3:1) | $4.30 | $1.56 |
| Cached input / 1M | $0.56 | $0.20 |
| Context window | 1M | 1M |
| Max output | 131K | 30K |
| Intelligence index | — | — |
| Coding index | — | — |
| Providers | 1 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | No | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-23 | 2026-10-16 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GLM 5.3 Prime or Grok 4.20 0309 Reasoning?
Grok 4.20 0309 Reasoning is 2.8× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix.
GLM 5.3 Prime vs Grok 4.20 0309 Reasoning: which has a bigger context window?
GLM 5.3 Prime: 1,000,000 tokens. Grok 4.20 0309 Reasoning: 1,000,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GLM 5.3 Prime ≈ $10,000, Grok 4.20 0309 Reasoning ≈ $3,750.
More comparisons
GLM 5.3 Prime vs GPT-6.1 TerraGLM 5.3 Prime vs GPT-6.1 Terra ProGLM 5.3 Prime vs Kimi K3.1 ProGLM 5.3 Prime vs MiniMax M3.1 FlashGLM 5.3 Prime vs DeepSeek V4.1 Flash 1017GLM 5.3 Prime vs Nemotron 3.5 Super VLGLM 5.3 Prime vs Gemini 4 ArgonGLM 5.3 Prime vs Claude Haiku 5.5GLM 5.3 Prime vs Nano Banana 2.1GLM 5.3 Prime vs Mistral Large 4GLM 5.3 Prime vs GPT-6.1 Sol ProGLM 5.3 Prime vs GPT-6.1 SolGLM 5.3 Prime vs Claude Sonnet 5.5GLM 5.3 Prime vs Qwen3.8 Max PrimeGLM 5.3 Prime vs Command A+GLM 5.3 Prime vs GPT-6 Luna ProGrok 4.20 0309 Reasoning vs GPT-6.1 TerraGrok 4.20 0309 Reasoning vs GPT-6.1 Terra ProGrok 4.20 0309 Reasoning vs Kimi K3.1 ProGrok 4.20 0309 Reasoning vs MiniMax M3.1 FlashGrok 4.20 0309 Reasoning vs DeepSeek V4.1 Flash 1017Grok 4.20 0309 Reasoning vs Nemotron 3.5 Super VLGrok 4.20 0309 Reasoning vs Gemini 4 ArgonGrok 4.20 0309 Reasoning vs Claude Haiku 5.5