Sim is the open-source AI workspace where teams build, deploy, and manage AI agents. This page compares Claude Opus 5.5 and Grok 4.7 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
Claude Opus 5.5 vs Grok 4.7
Grok 4.7 is 2.3× cheaper than Claude Opus 5.5: 1,000 agent calls with 10k input and 1k output tokens each cost $26 versus $60 at standard rates.
Claude Opus 5.5 charges $4 input and $20 output per 1M tokens; Grok 4.7 charges $2 and $6.
Claude Opus 5.5 has a 2× larger context window: 1M versus 500k tokens.
Only Claude Opus 5.5 supports native structured outputs in Sim.
Pricing, context window, and capabilities
API prices are per 1M tokens. Pricing last updated .
| Metric | Claude Opus 5.5 | Grok 4.7 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input price | $4/1M | $2/1M |
| Cached input | $0.2/1M | $0.5/1M |
| Output price | $20/1M | $6/1M |
| Long-context pricing | No long-context tier | Above 200k input tokens, the full request is priced at $4/1M input tokens, $1/1M cached input tokens, and $12/1M output tokens. |
| Context window | 1M tokens | 500k tokens |
| Released | Sep 22, 2026 | Sep 21, 2026 |
| Temperature | Not configurable | 0 to 2 |
| Reasoning effort | Not supported | low, medium, high, xhigh |
| Verbosity | Not supported | Not supported |
| Thinking levels | low, medium, high, xhigh, max (default: medium) | Not supported |
| Structured outputs | Supported (native) | 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 | Not published |
Use Claude Opus 5.5 or Grok 4.7 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
Grok 4.7 is 2.3× cheaper than Claude Opus 5.5: 1,000 agent calls with 10k input and 1k output tokens each cost $26 versus $60 at standard rates. Claude Opus 5.5 charges $4 input and $20 output per 1M tokens; Grok 4.7 charges $2 and $6.
