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GLM 5.1

ZhipuReleasedApr 7, 2026
Tool useReasoningPrompt caching
Compare GLM 5.1Count tokens for GLM 5.1
Context
203K
Max output
128K
Serving providers
2
Cheapest input
$1.05 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Benchmarks

independent evaluations · source: Artificial Analysis
Speed & latency
Output speed
91 t/s
tokens / second
Time to first token
10.49s
latency
Headline indices
Intelligence Index
40.2
of 100
Coding Index
55.8
of 100
Agentic Index
29.9
of 100
Individual benchmarks · click a row for effort variants
BenchmarkBest scoreEffortCost / task
AA-Briefcase24%——
CritPt5%default—
EvalComputeProxy7113.7default—
GDPval1256.7default—
GPQA Diamond87%default—
Humanity's Last Exam28%default—
IFBench76%default—
IT-Bench SRE40%default—
Long-Context Reasoning62%default—
Omniscience1.9default—
SciCode44%default—
TerminalBench Hard43%default—
TerminalBench v2.162%default—
τ-bench Banking12%default—
τ²-bench98%default—

Pricing by serving provider

standard tier · per 1M tokens · click a provider to expand

Input pricing runs from $1.05 to $1.40 per 1M tokens across 2 providers, so the dearest route costs 33% more than the cheapest for the same model.

Serving providerInput /1MOutput /1MEndpoints
OpenRouterCheapest$1.05$3.501
ComponentUnitStandardBatchCached
Text cached in/1M tok$0.5250——
Text cache write/1M tok$0——
Text input/1M tok$1.05——
Text output/1M tok$3.50——
Zai$1.40$4.401

Price history

input + output $/1M since we started tracking
Input Output

Price history is accruing. We record a point each day a price changes; the full backfill lands shortly.

Cost calculator

estimate your monthly spend on this model
$490
estimated / month

Model IDs

copy the exact identifier for your platform
openrouter/z-ai/glm-5.1zai/glm-5.1

Frequently asked questions

GLM 5.1 pricing, context and availability

How much does GLM 5.1 cost?

GLM 5.1 costs $1.05 per 1M input tokens and $3.50 per 1M output tokens at its cheapest provider via OpenRouter. Across 2 serving providers, input prices range from $1.05 to $1.40 per 1M tokens.

What is the context window of GLM 5.1?

GLM 5.1 accepts up to 203K tokens of context and can return up to 128K output tokens.

Which providers serve GLM 5.1?

GLM 5.1 is available from 2 serving providers, each with its own pricing and model ID. OpenRouter is currently the cheapest.

What can GLM 5.1 do?

GLM 5.1 supports tool use, reasoning and prompt caching.

Other Zhipu models

compare pricing across the Zhipu lineup
GLM 4.6$0.40/1M · 6 providersGLM 4.7$0.40/1M · 5 providersGLM 4.5 Air$0.13/1M · 4 providersGLM 4.5$0.40/1M · 4 providersGLM 4.7 Flash$0.00/1M · 3 providersGLM 5$0.80/1M · 3 providersGLM 4.5V$0.60/1M · 2 providersZai GLM 4.7$0.60/1M · 2 providers

Popular comparisons

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Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily

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