GLM 5.3 Flash vs GPT-5.6 Sol
API pricing, context window and capabilities for GLM 5.3 Flash and GPT-5.6 Sol, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.
Verdict
computed from the published numbersGLM 5.3 Flash wins on price. GPT-5.6 Sol wins on Terminal-Bench, on intelligence and on context window.
Price
GLM 5.3 Flash
Terminal-Bench
GPT-5.6 Sol
Intelligence
GPT-5.6 Sol
Context window
GPT-5.6 Sol
Key takeaways
who wins on what, from the published numbersGLM 5.3 Flash wins
- Cheaper input ($0.11 vs $2.00 /1M)
- Cheaper output ($0.35 vs $10.00 /1M)
- Higher max output (1M vs 128K)
- More serving providers (13 vs 6)
GPT-5.6 Sol wins
- Larger context window (1M vs 1.1M)
- Has web search
Cheaper overall
GLM 5.3 Flash
$0.11 + $0.35 /1M
Larger context
GPT-5.6 Sol
1.1M
More providers
GLM 5.3 Flash
13 providers
Pricing & specs
cheapest listed route · per 1M tokensOn-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower. An OpenRouter routed quote is the price of whichever upstream provider OpenRouter prefers today, so it moves day to day.
| GLM 5.3 Flash | GPT-5.6 Sol | |
|---|---|---|
| Input $/1M | $0.11via Sail best | $2.00OpenRouter routed quote |
| Output $/1M | $0.35via Sail best | $10.00OpenRouter routed quote |
| Context window | 1M | 1.1M best |
| Max output | 1M best | 128K |
| Serving providers | 13 best | 6 |
| Date | Released Aug 26, 2026 | Released Jul 9, 2026 |
Benchmarks
Benchmark scores, side by side| GLM 5.3 Flash | GPT-5.6 Sol | |
|---|---|---|
| Intelligence | 41.8 | 47.0 best |
| Terminal-Bench | 84% | 90% best |
| GPQA Diamond | 91% | 94% best |
| Output speed | 67 t/s | 94 t/s best |
| Latency (TTFT) | 2.80s best | 138.40s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.3 Flash
via Sail
$0.90
GPT-5.6 Sol
via OpenRouter
$20
Capabilities
feature support, side by side| Feature | GLM 5.3 Flash | GPT-5.6 Sol |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.3 Flash or GPT-5.6 Sol?
GLM 5.3 Flash is cheaper for input ($0.11 vs $2.00 per 1M tokens) from Sail. GLM 5.3 Flash is cheaper for output ($0.35 vs $10.00 per 1M tokens) from Sail.
What is the context window difference between GLM 5.3 Flash and GPT-5.6 Sol?
GLM 5.3 Flash has a 1M-token context window and GPT-5.6 Sol has 1.1M tokens, so GPT-5.6 Sol can take a larger prompt.
How do GLM 5.3 Flash and GPT-5.6 Sol compare on benchmarks?
On the tracked benchmarks, GPT-5.6 Sol leads on Terminal-Bench, and GPT-5.6 Sol leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026
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