OpenAI: GPT-6 Sol (batch) vs Z.ai: GLM 5.3 Flash (batch)

For a sample job of 1 million input tokens and 250,000 output tokens, GLM 5.3 Flash (batch) costs $0.11 and GPT-6 Sol (batch) costs $2.25, so GLM 5.3 Flash (batch) is about 20.5 times cheaper for the same work.

Both take in a similar amount of text: 1,050,000 and 1,048,576 tokens, about 1,575 and 1,573 pages.

Only GLM 5.3 Flash (batch) offers video input.

On our blended benchmark score GPT-6 Sol (batch) leads 81.4 to 70.6.

Across the 20 tasks where they differ, GPT-6 Sol (batch) scores higher on 13 (SQL Generation, Code Review, Code Refactoring and others), GLM 5.3 Flash (batch) on 7 (Code Completion, Code Documentation, Regex Writing and others).

GPT-6 Sol (batch) was released in September 2026 and GLM 5.3 Flash (batch) in August 2026.

Pick GPT-6 Sol (batch) if you need benchmark performance; pick GLM 5.3 Flash (batch) if you need lower cost or video input.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.