GLM-5.3 vs GPT-5.6 Sol: Specs & Benchmark Comparison
GLM-5.3 is developed by Zhipu AI, while GPT-5.6 Sol comes from OpenAI. GPT-5.6 Sol was released in July 2026, and GLM-5.3 followed a month later in August 2026. GLM-5.3 has a published size of about 753 billion parameters; OpenAI has not disclosed the parameter count of GPT-5.6 Sol.
We have 3 benchmark results for GLM-5.3 and 44 benchmark results for GPT-5.6 Sol, but they overlap on a single test: Terminal-Bench 2.1, where GPT-5.6 Sol scores 88.8% against 88.0%.
GLM-5.3 is the cheaper API at $1.40 per million input tokens and $4.40 per million output tokens, roughly 4 times cheaper than GPT-5.6 Sol at $5 and $30. Both accept a context window of about 1M tokens. GLM-5.3 accepts text as input, while GPT-5.6 Sol accepts text and images.
| Characteristic | GLM-5.3 | GPT-5.6 Sol |
|---|---|---|
| Company | Zhipu AI | OpenAI |
| Release Date | August 14, 2026 | July 9, 2026 |
| Parameters | 753B | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 131K | 128K |
| Input Price / 1M | $1.40 | $5.00 |
| Output Price / 1M | $4.40 | $30.00 |
| Average Score | 83.3% | 64.5% |
| Benchmarks | ||
| Terminal-Bench 2.1 | 88.0% | 88.8% |
Visual Benchmark Comparison
Verdict
GLM-5.3 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GLM-5.3 — 0.8, GPT-5.6 Sol — 0.6.
GLM-5.3 is 6.0x cheaper: input $1.40/1M vs $5.00/1M tokens.
GPT-5.6 Sol supports a larger context: 1M vs 1M tokens.
GLM-5.3 is newer: released 8/14/2026 vs 7/9/2026.
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Frequently Asked Questions
Which is better for coding — GLM-5.3 or GPT-5.6 Sol?
Which model is cheaper — GLM-5.3 or GPT-5.6 Sol?
Which has a larger context window — GLM-5.3 or GPT-5.6 Sol?
The GLM-5.3 and GPT-5.6 Sol comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-5.3 or GPT-5.6 Sol page. See also the complete list of AI model comparisons.