GPT-5.4 Pro vs Qwen3.5-397B-A17B
GPT-5.4 Pro (2026) and Qwen3.5-397B-A17B (2026) are frontier-tier reasoning models from OpenAI and Alibaba. GPT-5.4 Pro ships a 1.1M-token context window, while Qwen3.5-397B-A17B ships a 262K-token context window. On pricing, Qwen3.5-397B-A17B costs $0.39/1M input tokens versus $30/1M for the alternative. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing.
Qwen3.5-397B-A17B is ~7592% cheaper at $0.39/1M; pay for GPT-5.4 Pro only for coding workflow support.
Decision scorecard
Local evidence first| Signal | GPT-5.4 Pro | Qwen3.5-397B-A17B |
|---|---|---|
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1.1M | 262K |
| Cheapest output | $180/1M tokens | $2.34/1M tokens |
| Provider routes | 2 tracked | 3 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- GPT-5.4 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GPT-5.4 Pro uniquely exposes Vision and Code execution in local model data.
- Local decision data tags GPT-5.4 Pro for Coding, RAG, and Agents.
- Qwen3.5-397B-A17B has the lower cheapest tracked output price at $2.34/1M tokens.
- Qwen3.5-397B-A17B has broader tracked provider coverage for fallback and procurement flexibility.
- Local decision data tags Qwen3.5-397B-A17B for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output prices on this page.
GPT-5.4 Pro
$69,000
Cheapest tracked route: OpenRouter
Qwen3.5-397B-A17B
$897
Cheapest tracked route: OpenRouter
Estimated monthly gap: $68,103. Batch, cache, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Qwen3.5-397B-A17B is $178/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision and Code execution before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- GPT-5.4 Pro is $178/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GPT-5.4 Pro adds Vision and Code execution in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-01 | 2026-02-16 |
| Context window | 1.1M | 262K |
| Parameters | — | 397B |
| Architecture | decoder only | MoE |
| License | Proprietary | Apache 2.0 |
| Knowledge cutoff | 2025-08 | - |
Pricing and availability
| Pricing attribute | GPT-5.4 Pro | Qwen3.5-397B-A17B |
|---|---|---|
| Input price | $30/1M tokens | $0.39/1M tokens |
| Output price | $180/1M tokens | $2.34/1M tokens |
| Providers |
Capabilities
| Capability | GPT-5.4 Pro | Qwen3.5-397B-A17B |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | Yes |
| Reasoning | Yes | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | Yes |
| Code execution | Yes | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on vision: GPT-5.4 Pro and code execution: GPT-5.4 Pro. Both models share multimodal input, reasoning mode, function calling, and tool use, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, GPT-5.4 Pro lists $30/1M input and $180/1M output tokens, while Qwen3.5-397B-A17B lists $0.39/1M input and $2.34/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Qwen3.5-397B-A17B lower by about $74.03 per million blended tokens. Availability is 2 providers versus 3, so concentration risk also matters.
Choose GPT-5.4 Pro when coding workflow support and larger context windows are central to the workload. Choose Qwen3.5-397B-A17B when provider fit, lower input-token cost, and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, GPT-5.4 Pro or Qwen3.5-397B-A17B?
GPT-5.4 Pro supports 1.1M tokens, while Qwen3.5-397B-A17B supports 262K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is cheaper, GPT-5.4 Pro or Qwen3.5-397B-A17B?
Qwen3.5-397B-A17B is cheaper on tracked token pricing. GPT-5.4 Pro costs $30/1M input and $180/1M output tokens. Qwen3.5-397B-A17B costs $0.39/1M input and $2.34/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is GPT-5.4 Pro or Qwen3.5-397B-A17B open source?
GPT-5.4 Pro is listed under Proprietary. Qwen3.5-397B-A17B is listed under Apache 2.0. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, GPT-5.4 Pro or Qwen3.5-397B-A17B?
GPT-5.4 Pro has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, GPT-5.4 Pro or Qwen3.5-397B-A17B?
Both GPT-5.4 Pro and Qwen3.5-397B-A17B expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run GPT-5.4 Pro and Qwen3.5-397B-A17B?
GPT-5.4 Pro is available on OpenRouter and OpenAI API. Qwen3.5-397B-A17B is available on OpenRouter, Together AI, and Alibaba Cloud PAI-EAS. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-11. Data sourced from public model cards and provider documentation.