Grok 4.6 vs Claude Sonnet 5.5: price, context window and capabilities
Grok 4.6 (x-ai/grok-4.6) from SpaceXAI and Claude Sonnet 5.5 (anthropic/claude-sonnet-5.5) from Anthropic are both multimodal language models on the OceanToken API. Grok 4.6 costs less for output: $6.00 against $9.00 per 1M output tokens (33% less); Claude Sonnet 5.5 costs less for input: $1.80 against $2.00 per 1M input tokens (10% less). Claude Sonnet 5.5 is 10% off its official price on OceanToken, for every account. Claude Sonnet 5.5 has the larger context window: 1M tokens (1,000,000) against 500K (500,000) for Grok 4.6. Both support tool calling, reasoning, structured outputs, image input and file input.
Side by side
| Spec | Grok 4.6 | Claude Sonnet 5.5 −10% |
|---|---|---|
| Model | Grok 4.6x- | Claude Sonnet 5.5anthropic/ |
| Publisher | SpaceXAI | Anthropic |
| Kind | Text & vision | Text & vision |
| Context window | 500K tokens500,000 | 1M tokens1,000,000 |
| Input price | $2.00 / 1M tokens | $1.80 / 1M tokens |
| Output price | $6.00 / 1M tokens | $9.00 / 1M tokens |
| Cached input price | $0.50 / 1M tokens | $0.10 / 1M tokens |
| Web search price | $0.005 / search | $0.01 / search |
| Cache write price | – | $2.50 / 1M tokens |
| Discount (vs official, top tier) | — | −10% |
| Inputs | text, images and files | text, images and files |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Price depends on the mix: Grok 4.6 costs less for output and Claude Sonnet 5.5 for input, so estimate both on your own volume of input tokens and output tokens.
- Choose Claude Sonnet 5.5 for the longest inputs: its context window holds 1M tokens against 500K for Grok 4.6.
- Both list the same capabilities: tool calling, reasoning, structured outputs, image input and file input.
- Not sure? Call both with the same OceanToken API key and compare them on your own prompts; each request is billed per use from one prepaid balance.
Get API Key Grok 4.6 Claude Sonnet 5.5
Frequently asked questions
Which is cheaper, Grok 4.6 or Claude Sonnet 5.5?
It depends on the mix of tokens. Grok 4.6 costs less for output: $6.00 against $9.00 per 1M output tokens (33% less); Claude Sonnet 5.5 costs less for input: $1.80 against $2.00 per 1M input tokens (10% less). Claude Sonnet 5.5 is 10% off its official price on OceanToken, for every account. The OceanToken console always shows the current price.
Which has the larger context window, Grok 4.6 or Claude Sonnet 5.5?
Claude Sonnet 5.5. Claude Sonnet 5.5 has the larger context window: 1M tokens (1,000,000) against 500K (500,000) for Grok 4.6.
Can I call both Grok 4.6 and Claude Sonnet 5.5 with one API key?
Yes. Both are on the OceanToken API at https://api.oceantoken.ai/v1: one API key and one prepaid balance call either model. Send the model id x-ai/grok-4.6 or anthropic/claude-sonnet-5.5.
Models and publishers
Grok 4.6 · Claude Sonnet 5.5 · All SpaceXAI models · All Anthropic models
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