claude-opus-4-8 vs glm-5.2

Pricing, Performance & Features Comparison

claude-opus-4-8

Authoranthropic

Context Length1M

Reasoning

Providers1

ReleasedMay 2026

Knowledge Cutoff–

License–

Anthropic’s most capable Opus-tier model, tuned for long-horizon agentic work, knowledge work, and memory.

Input$5

Output$25

Latency (p50)5.1s

Output Limit128K

Function Calling

JSON Mode

InputText, Image

OutputText

anthropic

in$5out$25cache$0.5write$6.3

Latency (24h)

Success Rate (24h)

glm-5.2

Authorzai

Context Length1M

Reasoning

Providers1

ReleasedJun 2026

Knowledge Cutoff–

License–

Z.ai’s flagship (744B MoE, MIT open weights) with a 1M-token context window and adjustable reasoning effort, built for long-horizon coding and agentic tasks.

Input$1.4

Output$4.4

Latency (p50)7s

Output Limit131K

Function Calling

JSON Mode

InputText

OutputText

zai

in$1.4out$4.4cache$0.26–