Side-by-side comparison of pricing, context window, benchmarks, capabilities, and license. Data sourced from the Interestana AI Index, kept current as developers update their models.
Model A — Anthropic
Claude 4 Opus is Anthropic’s most capable model for long-horizon agentic work, multi-step reasoning, and complex coding projects.
Model B — Alibaba
Qwen3 235B is Alibaba’s flagship open-weight model. The MoE architecture and Apache 2.0 license make it a popular base for fine-tuning in the open-source community.
| Property | Claude 4 Opus | Qwen3 235B |
|---|---|---|
| Released | May 22, 2025 | Apr 29, 2025 |
| Developer | Anthropic | Alibaba |
| Type | reasoning | llm |
| License | proprietary | open-weight |
| Context window | 200,000 | 128,000 |
| Parameters | — | 235B MoE (22B active) |
| Input $/M tokens | $15.00 | — |
| Output $/M tokens | $75.00 | — |
Bold green values indicate the winner on that dimension where comparison is meaningful (lower price wins; bigger context wins; more open license wins; newer date wins).
Programmatic access available at /api/ai/compare?a=claude-4-opus&b=qwen-3-235b. CORS is open. Citation guidance: /about/editorial-process.