Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. This page compares GPT-6 Sol and DeepSeek V4 Pro on API pricing per 1M tokens, context window, max output, and capabilities. Both models are available in the Sim Agent block, and each Agent block in a Sim agent can use a different model.
API model comparison
GPT-6 Sol vs DeepSeek V4 Pro
DeepSeek V4 Pro is 1.7× cheaper than GPT-6 Sol: 1,000 agent calls with 10k input and 1k output tokens each cost $17.16 versus $30 at standard rates.
GPT-6 Sol charges $2 input and $10 output per 1M tokens; DeepSeek V4 Pro charges $1.32 and $3.96.
Their context windows are about the same size: 1.05M versus 1M tokens.
DeepSeek V4 Pro can generate up to 384k output tokens per response, versus 128k.
Both support configurable reasoning and tool choice control in Sim.
Pricing, context window, and capabilities
API prices are per 1M tokens. Pricing last updated .
| Metric | GPT-6 Sol | DeepSeek V4 Pro |
|---|---|---|
| Provider | OpenAI | DeepSeek |
| Input price | $2/1M | $1.32/1M |
| Cached input | $0.2/1M | $0.044/1M |
| Output price | $10/1M | $3.96/1M |
| Long-context pricing | Above 272k input tokens, the full request is priced at $4/1M input tokens, $0.4/1M cached input tokens, and $15/1M output tokens. | No long-context tier |
| Context window | 1.05M tokens | 1M tokens |
| Released | Sep 22, 2026 | Apr 24, 2026 |
| Temperature | Not configurable | Not configurable |
| Reasoning effort | none, low, medium, high, xhigh, max | low, high, max |
| Verbosity | low, medium, high | Not supported |
| Thinking levels | Not supported | none, enabled (default: enabled) |
| Structured outputs | Supported | Supported |
| Tool choice | Supported | Supported |
| Computer use | Not supported | Not supported |
| Deep research | Not supported | Not supported |
| Memory support | Supported | Supported |
| Max output tokens | 128k | 384k |
Use GPT-6 Sol or DeepSeek V4 Pro in a Sim agent
Both models are available in the Sim Agent block. Pick either one from the model picker, and each Agent block in the same agent can use a different model.
Frequently asked questions
DeepSeek V4 Pro is 1.7× cheaper than GPT-6 Sol: 1,000 agent calls with 10k input and 1k output tokens each cost $17.16 versus $30 at standard rates. GPT-6 Sol charges $2 input and $10 output per 1M tokens; DeepSeek V4 Pro charges $1.32 and $3.96.
