Official-source comparison

Claude Sonnet 5 vs Grok 4.5

Anthropic vs xAI. Compare similar input-price quotes with different output costs.

VerifiedRecently verified against the official source. Last successfully verified 2026-10-23 UTC.
VerifiedRecently verified against the official source. Last successfully verified 2026-10-23 UTC.

USD token-only estimates using each offering’s published default tier. 1M tokens are an aggregate workload, not a single request. Cache savings, batch discounts, long-context surcharges, tools, taxes and negotiated rates are excluded. Tokenizers and capabilities may differ; lower price does not establish equivalent quality.

xAI · Grok 4.5 is 33.3% cheaper for this workload. Absolute difference: $4.00.

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Current verified prices and specifications
MetricClaude Sonnet 5AnthropicGrok 4.5xAI
Input / 1M tokens$2.00$2.00
Output / 1M tokens$10.00$6.00
Cached input / 1MNot published$0.30
Context windowNot published500,000
Maximum outputNot publishedNot published
1M input + 1M output$12.00$8.00
Default pricing basisstandardstandard
Last verified (UTC)2026-10-23T00:19:51.655Z2026-10-23T00:19:55.845Z

Estimate a different workload

Each calculator uses the same default-tier assumption described above.

Claude Sonnet 5 · Anthropic

Estimated cost$40.00for this workload

Grok 4.5 · xAI

Estimated cost$32.00for this workload
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Official sources and pricing scope