High-volume, cost-sensitive work
Either one
Both cost $6.00 per million tokens on a typical mix of three input tokens for every output token.
Claude Sonnet 4.5 vs Qwen3.8 Max Prime: price, context and capabilities
Choose Claude Sonnet 4.5 for reused prompts and documents (RAG, agents). Choose Qwen3.8 Max Prime for writing and code generation, very long inputs and the latest release.
In short
- Both cost the same at the headline price ($6.00 / 1M tokens).
- Qwen3.8 Max Prime reads more per request: 1M tokens against 200k.
- Qwen3.8 Max Prime is the newer model (Sep 23, 2026, against September 2025).
- Only Claude Sonnet 4.5 offers batch api.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Writing and code generation
Choose Qwen3.8 Max Prime
Qwen3.8 Max Prime charges $12.00 per million output tokens, against $15.00 for Claude Sonnet 4.5. Output dominates the bill when answers are long.
Reused prompts and documents (RAG, agents)
Choose Claude Sonnet 4.5
Claude Sonnet 4.5 charges $0.30 per million cached input tokens, against $0.50 for Qwen3.8 Max Prime.
Very long inputs
Choose Qwen3.8 Max Prime
Qwen3.8 Max Prime reads up to 1M tokens per request, against 200k for Claude Sonnet 4.5.
Latest release
Choose Qwen3.8 Max Prime
Qwen3.8 Max Prime is the newer release (Sep 23, 2026, against September 2025 for Claude Sonnet 4.5).
Monthly cost at three volumes
| Volume | Claude Sonnet 4.5 | Qwen3.8 Max Prime | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $6.75 | $7.00 | Claude Sonnet 4.5, $0.25 less |
| Production: 20M input, 5M output tokens | $135.00 | $140.00 | Claude Sonnet 4.5, $5.00 less |
| Scale: 500M input, 100M output tokens | $3,000 | $3,200 | Claude Sonnet 4.5, $200.00 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Claude Sonnet 4.5 | Qwen3.8 Max Prime | |
|---|---|---|
| Provider | Anthropic | Alibaba Cloud (Qwen) |
| Category | Language models | Language models |
| Status | Deprecated | Generally available |
| Headline price | $6.00 / 1M tokens | $6.00 / 1M tokens |
| Input | $3.00 / 1M tokens | $4.00 / 1M tokens |
| Output | $15.00 / 1M tokens | $12.00 / 1M tokens |
| Cached input | $0.30 / 1M tokens | $0.50 / 1M tokens |
| Context window | 200k | 1M |
| Max output | 64k | 131k |
| Released | September 2025 | Sep 23, 2026 |
| Knowledge cutoff | No data | No data |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching |
| API model id | claude-sonnet-4-5-20250929 | qwen3.8-max-prime |
Frequently asked questions
Should I choose Claude Sonnet 4.5 or Qwen3.8 Max Prime?
Choose Claude Sonnet 4.5 for reused prompts and documents (RAG, agents). Choose Qwen3.8 Max Prime for writing and code generation, very long inputs and the latest release.
Which is cheaper, Claude Sonnet 4.5 or Qwen3.8 Max Prime?
Both cost the same at the headline price ($6.00 / 1M tokens).
Which has the larger context window, Claude Sonnet 4.5 or Qwen3.8 Max Prime?
Qwen3.8 Max Prime reads more per request: 1M tokens against 200k.
What is the difference between Claude Sonnet 4.5 and Qwen3.8 Max Prime?
Claude Sonnet 4.5 is made by Anthropic and Qwen3.8 Max Prime by Alibaba Cloud (Qwen). Both cost the same at the headline price ($6.00 / 1M tokens). Qwen3.8 Max Prime reads more per request: 1M tokens against 200k. Qwen3.8 Max Prime is the newer model (Sep 23, 2026, against September 2025). Only Claude Sonnet 4.5 offers batch api.
How much do Claude Sonnet 4.5 and Qwen3.8 Max Prime cost per month?
At 20 million input and 5 million output tokens a month, Claude Sonnet 4.5 costs $135.00 and Qwen3.8 Max Prime costs $140.00, at standard rates.
Which is newer, Claude Sonnet 4.5 or Qwen3.8 Max Prime?
Qwen3.8 Max Prime was released on Sep 23, 2026 and Claude Sonnet 4.5 on September 2025.