Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
Model details →Anthropic: Claude Sonnet 5 (batch) vs SpaceXAI: Grok 4.3
Anthropic: Claude Sonnet 5 (batch) and SpaceXAI: Grok 4.3 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 5 (batch) | SpaceXAI: Grok 4.3 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 1M | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $1.00 | $1.25 | 🏆 Anthropic: Claude Sonnet 5 (batch) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $5.00 | $2.50 | 🏆 SpaceXAI: Grok 4.3 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Sonnet 5 (batch) better than SpaceXAI: Grok 4.3?
Anthropic: Claude Sonnet 5 (batch) and SpaceXAI: Grok 4.3 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Sonnet 5 (batch) and SpaceXAI: Grok 4.3?
Input: $1.00 vs $1.25 per 1M tokens. Output: $5.00 vs $2.50 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 5 (batch) and SpaceXAI: Grok 4.3 support?
Anthropic: Claude Sonnet 5 (batch) supports up to 1M tokens. SpaceXAI: Grok 4.3 supports up to 1M tokens.
Do both Anthropic: Claude Sonnet 5 (batch) and SpaceXAI: Grok 4.3 support tool calling?
Anthropic: Claude Sonnet 5 (batch): yes. SpaceXAI: Grok 4.3: yes.