CtrlAltDebrief

GLM 5.1 vs GLM 5.2

API pricing, context window and capabilities for GLM 5.1 and GLM 5.2, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.

Verdict

computed from the published numbers

GLM 5.2 wins on price, on Terminal-Bench, on intelligence and on context window.

Price
GLM 5.2
Terminal-Bench
GLM 5.2
Intelligence
GLM 5.2
Context window
GLM 5.2

Key takeaways

who wins on what, from the published numbers

GLM 5.1 wins

No clear edge on the tracked metrics.

GLM 5.2 wins

  • Cheaper input ($1.05 vs $0.05 /1M)
  • Cheaper output ($3.50 vs $1.98 /1M)
  • Larger context window (205K vs 1M)
  • Higher max output (203K vs 1M)
  • More serving providers (12 vs 20)
  • Supports vision
Cheaper overall
GLM 5.2
$0.05 + $1.98 /1M
Larger context
GLM 5.2
1M
More providers
GLM 5.2
20 providers

Pricing & specs

cheapest listed route · per 1M tokens
On-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 5.1GLM 5.2
Input $/1M$1.05via DeepInfra $0.05OpenRouter routed quote best
Output $/1M$3.50via DeepInfra $1.98via Scx AI best
Context window205K 1M best
Max output203K 1M best
Serving providers12 20 best
DateReleased Apr 7, 2026 Released Jun 13, 2026

Benchmarks

Benchmark scores, side by side
GLM 5.1GLM 5.2
Intelligence26.1 33.7 best
Terminal-Bench62% 78% best
GPQA Diamond87% 89% best
Output speed66 t/s 83 t/s best
Latency (TTFT)1.71s best2.97s

Cost calculator

choose a serving route for each side
Input tokens / month
Output tokens / month
GLM 5.1
via DeepInfra
$8.75
GLM 5.2
via OpenRouter
$7.25

Capabilities

feature support, side by side
FeatureGLM 5.1GLM 5.2
Vision—✓
Tool use✓✓
Reasoning✓✓
Audio——
Prompt caching✓✓
Structured output✓✓
Web search——

Related comparisons

Frequently asked questions

Which is cheaper, GLM 5.1 or GLM 5.2?
GLM 5.2 is cheaper for input ($1.05 vs $0.05 per 1M tokens) as an OpenRouter routed quote. GLM 5.2 is cheaper for output ($3.50 vs $1.98 per 1M tokens) from Scx AI.
What is the context window difference between GLM 5.1 and GLM 5.2?
GLM 5.1 has a 205K-token context window and GLM 5.2 has 1M tokens, so GLM 5.2 can take a larger prompt.
How do GLM 5.1 and GLM 5.2 compare on benchmarks?
On the tracked benchmarks, GLM 5.2 leads on Terminal-Bench, and GLM 5.2 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026

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