Claude Sonnet 4.5 vs Grok Build 0.1
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Claude Sonnet 4.5 | Grok Build 0.1 |
|---|---|---|
| Developer | Anthropic | xAI |
| Family | Claude 4 | Grok Build |
| Model | Claude Sonnet 4.5 | Grok Build 0.1 |
| Version | Claude Sonnet 4.5 | Grok Build 0.1 |
| Lifecycle | active | preview |
| Released | 2025-09-29 | 2026-05-29 |
| Knowledge cutoff | 2025-01-01 | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 200,000 | 256,000 |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Anthropic (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
14 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
Claude Sonnet 4.5 Capabilities
Grok Build 0.1 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Sonnet 4.5Anthropic | vs | Claude Sonnet 4.6Anthropic | family variantsimage, text |
 GPT-5.3-CodexOpenAI | vs | cross-developer peersimage, text | |
Claude Opus 4.5Anthropic | vs | Claude Sonnet 4.5Anthropic | family variantsimage, text |
Grok 4.5xAI | vs | family variantsimage, text | |
Grok 4.3xAI | vs | family variantsimage, text | |
Claude Sonnet 4.5Anthropic | vs | Claude Sonnet 5Anthropic | family variantsimage, text |
Claude Sonnet 4.5Anthropic | vs | o3OpenAI | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs | o3-proOpenAI | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs |  Qwen3 VL FlashQwen | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs | GPT-5 NanoOpenAI | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs | GPT-5 ProOpenAI | cross-developer peersimage, text |
Claude Sonnet 4.5Anthropic | vs | GPT-5.3-CodexOpenAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Claude Sonnet 4.5 vs Grok Build 0.1 FAQs
Is Claude Sonnet 4.5 or Grok Build 0.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Claude Sonnet 4.5 and Grok Build 0.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Claude Sonnet 4.5 or Grok Build 0.1?+
Claude Sonnet 4.5 is $3.00 and Grok Build 0.1 is $1.00 per million tokens, so Grok Build 0.1 is cheaper on this metric. Claude Sonnet 4.5 is $15.00 and Grok Build 0.1 is $2.00 per million tokens, so Grok Build 0.1 is cheaper on this metric.
Which has a larger context window, Claude Sonnet 4.5 or Grok Build 0.1?+
Grok Build 0.1 has the larger sourced context window. Claude Sonnet 4.5 supports 200,000 and Grok Build 0.1 supports 256,000.
Which performs better in benchmarks, Claude Sonnet 4.5 or Grok Build 0.1?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Claude Sonnet 4.5 or Grok Build 0.1 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Claude Sonnet 4.5 is not marked open weight; Grok Build 0.1 is not marked open weight.
Can Claude Sonnet 4.5 and Grok Build 0.1 understand images?+
Claude Sonnet 4.5 is documented with image input; Grok Build 0.1 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Claude Sonnet 4.5 or Grok Build 0.1?+
Neither has a larger sourced maximum output. Claude Sonnet 4.5 is 64,000 and Grok Build 0.1 is —.
Do Claude Sonnet 4.5 and Grok Build 0.1 support reasoning and tool use?+
Claude Sonnet 4.5: reasoning, tool calling, and image input. Grok Build 0.1: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Claude Sonnet 4.5 or Grok Build 0.1?+
Claude Sonnet 4.5 has 1 sourced provider route; Grok Build 0.1 has 1, a tie.
Which offers better value, Claude Sonnet 4.5 or Grok Build 0.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.