0

GLM 4.7 vs GPT-5.5

Head to head on 22 shared benchmarks, with price, context window, and release dates.

Benchmark scores

60

evals · sort by any column, ⤢ to expand fullscreen

Model
GPT-5.5

OpenAI

68.4%1844elo78.251.7%76.8%13.7%46.1%84.7%82.5%81.1%73.0%87.7%96.3%87.7%49.1%86.9%88.6%50.0%47.3%75.0%49.2%69.3%-86.2%54.2%12.9%36.2%86.0%90.0%100.0%-1315elo-34.0%51.8%5.7%44.8%24.9%1769elo15.1%-51.8%2.1%--92.8%-68.8%-78.7%45.3%100.0%51.5%4.258.6%75.7%83.4%57.4%68.1%69.8%61.9%
GLM 4.7

Zai

46.4%1411elo662.4%66.4%6.4%54.6%60.8%73.1%55.2%35.7%65.2%76.0%59.7%32.8%68.6%79.4%6.0%35.4%68.8%30.3%94.2%48.0%-------46.7%-28.6%-------90.0%--56.2%33.3%-33.3%-100.0%-----------51.9%
2 / 2 models
AttributeGLM 4.7

Zai

GPT-5.5

OpenAI

DescriptionGLM-4.7 is an AI model from Zai, released with open weights.GPT-5.5 is an AI model from OpenAI.
FamilyGlmGPT
Params--
Open weightsopenclosed
Licensemitproprietary
Released22 Dec 202523 Apr 2026
Context204,8001,050,000
Input $/1M$0.60$5.00
Output $/1M$2.20$30.00
Cache read $/1M$0.080$0.500
Cache write $/1M--
Speed0 tok/s0 tok/s
Latency0.00 s0.00 s
Modalitiestextfile, image, text
Providers--
PublisherZaiOpenAI
Reported scores

FAQ

Is GLM 4.7 or GPT-5.5 better?
Across the 22 benchmarks both models report on Sophon, GPT-5.5 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
How do GLM 4.7 and GPT-5.5 compare on GPQA Diamond?
GLM 4.7 scores 66.4% and GPT-5.5 scores 76.8% on GPQA Diamond.
Which is cheaper, GLM 4.7 or GPT-5.5?
GLM 4.7 is cheaper at $2.20 per million output tokens against $30.00 for GPT-5.5 - about 13.6x.
When were GLM 4.7 and GPT-5.5 released?
GLM 4.7 was released 22 Dec 2025 by Zai. GPT-5.5 was released 23 Apr 2026 by OpenAI.

Comparing something else? Build your own side-by-side.