Compare the listed model data for Anthropic Claude Opus 4.8 by Anthropic and Anthropic Claude Sonnet 4.6 by Anthropic. Benchmark and pricing records are not a controlled test and may change.
Data last updated: 2026-10-16. Verify current model details with each provider.
Anthropic Claude Opus 4.8: 200K tokens; Anthropic Claude Sonnet 4.6: 200K tokens. The listed context-window values are equal. Anthropic Claude Opus 4.8 is listed for coding, reasoning, vision, multimodal input, agentic workflows, long-context tasks; Anthropic Claude Sonnet 4.6 is listed for coding, reasoning, vision, multimodal input, agentic workflows, long-context tasks. Shared catalog benchmark entries: MMLU: Anthropic Claude Opus 4.8 92.1%; Anthropic Claude Sonnet 4.6 88.7%; HumanEval: Anthropic Claude Opus 4.8 90.5%; Anthropic Claude Sonnet 4.6 85.4%; GPQA: Anthropic Claude Opus 4.8 74.3%; Anthropic Claude Sonnet 4.6 65.2%; SWE-bench Verified: Anthropic Claude Opus 4.8 62.3%; Anthropic Claude Sonnet 4.6 49.0%. These records are reference data, not a controlled head-to-head test; verify current pricing and specifications with each provider.
Use these model and provider links to verify current specifications, pricing, and availability.
Using only the catalog's listed per-million-token rates, 1M input plus 1M output tokens costs about $36 for Anthropic Claude Opus 4.8 and $18 for Anthropic Claude Sonnet 4.6. This excludes provider-specific discounts, caching, and other fees.
Choose Anthropic Claude Opus 4.8 when your task aligns with catalog-listed uses or strengths such as Complex enterprise analysis requiring maximum accuracy: financial modeling, legal review, scientific research, Long-document processing: contracts, research papers, technical specifications up to 200K tokens, Agentic software engineering: autonomous multi-file codebase changes and complex debugging, Graduate-level academic and scientific reasoning requiring deep domain knowledge.
Choose Anthropic Claude Sonnet 4.6 when your task aligns with catalog-listed uses or strengths such as Everyday professional coding: code review, bug fixing, feature implementation, Business writing: reports, emails, proposals, and documentation at volume, Customer support automation requiring nuanced, accurate responses, Research summarization and information extraction from documents.
Anthropic's most powerful model ever. Deeper reasoning, stronger agentic coding, superior design sense, and sharper analytical precision than Opus 4.7.
Parameters: ~200B+ (frontier MoE, exact size proprietary)
Context: 200K tokens
Catalog pricing: Access via LITHOVEX AI free. Anthropic API: high-tier pricing.
Claude Sonnet 4.6 — Anthropic's fast, balanced model. High intelligence with low latency for everyday tasks and production use.
Parameters: ~70B (balanced tier, exact size proprietary)
Context: 200K tokens
Catalog pricing: Via LITHOVEX AI free. Anthropic API: mid-tier.
| Specification | Anthropic Claude Opus 4.8 | Anthropic Claude Sonnet 4.6 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Parameters | ~200B+ (frontier MoE, exact size proprietary) | ~70B (balanced tier, exact size proprietary) |
| Context window | 200K tokens | 200K tokens |
| Maximum output | Not listed | Not listed |
| Catalog pricing | Access via LITHOVEX AI free. Anthropic API: high-tier pricing. | Via LITHOVEX AI free. Anthropic API: mid-tier. |
| Listed input/output cost per 1M tokens | input $6, output $30 per 1M tokens | input $3, output $15 per 1M tokens |
| License | Proprietary | Proprietary |
| Coding support | Listed | Listed |
| Reasoning support | Listed | Listed |
| Vision input | Listed | Listed |
| Multimodal | Listed | Listed |
| Open weights | No | No |
| Benchmark: MMLU | 92.1% | 88.7% |
| Benchmark: HumanEval | 90.5% | 85.4% |
| Benchmark: GPQA | 74.3% | 65.2% |
| Benchmark: SWE-bench Verified | 62.3% | 49.0% |
Figures are transcribed from LITHOVEX model records. Benchmark versions and evaluation setups may differ; pricing and specifications can change. Check each provider's current documentation before making a decision.
Read the Anthropic Claude Opus 4.8 model profile and Anthropic Claude Sonnet 4.6 model profile, or browse the model directory.