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 →SpaceXAI: Grok 4.3 vs Anthropic: Claude Opus Latest
SpaceXAI: Grok 4.3 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
This model always redirects to the latest model in the Claude Opus family.
Model details →Side-by-side comparison
| Capability | SpaceXAI: Grok 4.3 | Anthropic: Claude Opus Latest | 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. | $1.25 | $5.00 | 🏆 SpaceXAI: Grok 4.3 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $2.50 | $25.00 | 🏆 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 SpaceXAI: Grok 4.3 better than Anthropic: Claude Opus Latest?
SpaceXAI: Grok 4.3 wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between SpaceXAI: Grok 4.3 and Anthropic: Claude Opus Latest?
Input: $1.25 vs $5.00 per 1M tokens. Output: $2.50 vs $25.00 per 1M tokens.
What context windows do SpaceXAI: Grok 4.3 and Anthropic: Claude Opus Latest support?
SpaceXAI: Grok 4.3 supports up to 1M tokens. Anthropic: Claude Opus Latest supports up to 1M tokens.
Do both SpaceXAI: Grok 4.3 and Anthropic: Claude Opus Latest support tool calling?
SpaceXAI: Grok 4.3: yes. Anthropic: Claude Opus Latest: yes.
Compare SpaceXAI: Grok 4.3 with other models
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