Compare

GPT-5.6 Sol vs GLM-5.2 Fast Preview

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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GPT-5.6 Sol
openai/gpt-5.6-sol
GLM-5.2 Fast Preview
zai-org/glm-5.2-fast-preview
Provider
OpenAI
Z.ai
Family
GPT-5
Modality
text
text
Context window
1,050,000 tok
Max output
128,000 tok
Released
2026-07-10
2026-09-08
License
Proprietary
Open-weight
Input price
$2.00 /1M
$2.80 /1M
Output price
$10.00 /1M
$8.80 /1M
Tools
yes
yes
Streaming
yes
yes
Vision
yes
JSON mode
yes
yes
Reasoning
yes
yes
Prompt caching
Batch API
Try it
Open in playground →
Open in playground →
GPT-5.6 Sol
openai/gpt-5.6-sol
Full spec →

GPT-5.6 Sol is OpenAI's frontier GPT-5.6 model for complex professional work, using the Responses API for reasoning and stateful context management.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows
GLM-5.2 Fast Preview
zai-org/glm-5.2-fast-preview
Full spec →
Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows

Compare with another

Claude Fable 5.1 vs GPT-5.6 Sol
anthropic/claude-fable-5.1 · openai/gpt-5.6-sol
Claude Fable 5.1 vs GLM-5.2 Fast Preview
anthropic/claude-fable-5.1 · zai-org/glm-5.2-fast-preview
Gemini 3.8 Flash vs GPT-5.6 Sol
google/gemini-3.8-flash · openai/gpt-5.6-sol
Gemini 3.8 Flash vs GLM-5.2 Fast Preview
google/gemini-3.8-flash · zai-org/glm-5.2-fast-preview
Claude Opus 5 vs GPT-5.6 Sol
anthropic/claude-opus-5 · openai/gpt-5.6-sol
Claude Opus 5 vs GLM-5.2 Fast Preview
anthropic/claude-opus-5 · zai-org/glm-5.2-fast-preview
Grok 4.6 vs GPT-5.6 Sol
xai/grok-4.6 · openai/gpt-5.6-sol
Grok 4.6 vs GLM-5.2 Fast Preview
xai/grok-4.6 · zai-org/glm-5.2-fast-preview
Glm-5.3 vs GPT-5.6 Sol
zai-org/glm-5.3 · openai/gpt-5.6-sol
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# GPT-5.6 Sol
client.chat.completions.create(
    model="openai/gpt-5.6-sol",
    messages=[{"role":"user","content":"hello"}],
)

# GLM-5.2 Fast Preview
client.chat.completions.create(
    model="zai-org/glm-5.2-fast-preview",
    messages=[{"role":"user","content":"hello"}],
)
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