Grok 4.20 vs Qwen3.5-27B
Grok 4.20 (2026) and Qwen3.5-27B (2026) are frontier-tier reasoning models from xAI and Alibaba. Grok 4.20 ships a 2M-token context window, while Qwen3.5-27B ships a 262K-token context window. On pricing, Qwen3.5-27B costs $0.2/1M input tokens versus $4.2/1M 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.
Qwen3.5-27B is ~2054% cheaper at $0.2/1M; pay for Grok 4.20 only for long-context analysis.
Specs
| Released | 2026-01-01 | 2026-02-24 |
| Context window | 2M | 262K |
| Parameters | — | 27B |
| Architecture | - | decoder only |
| License | Proprietary | Apache 2.0 |
| Knowledge cutoff | - | - |
Pricing and availability
| Grok 4.20 | Qwen3.5-27B | |
|---|---|---|
| Input price | $4.2/1M tokens | $0.2/1M tokens |
| Output price | $12.60/1M tokens | $1.56/1M tokens |
| Providers |
Capabilities
| Grok 4.20 | Qwen3.5-27B | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint is close: both models cover reasoning mode, function calling, tool use, and structured outputs. That makes context budget, benchmark fit, and provider maturity more important than a simple checklist. If your application depends on one integration detail, verify it against the provider route you plan to use, not just the base model listing.
For cost, Grok 4.20 lists $4.2/1M input and $12.60/1M output tokens, while Qwen3.5-27B lists $0.2/1M input and $1.56/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Qwen3.5-27B lower by about $6.12 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Grok 4.20 when long-context analysis and larger context windows are central to the workload. Choose Qwen3.5-27B when provider fit and lower input-token cost 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. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Which has a larger context window, Grok 4.20 or Qwen3.5-27B?
Grok 4.20 supports 2M tokens, while Qwen3.5-27B 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, Grok 4.20 or Qwen3.5-27B?
Qwen3.5-27B is cheaper on tracked token pricing. Grok 4.20 costs $4.2/1M input and $12.60/1M output tokens. Qwen3.5-27B costs $0.2/1M input and $1.56/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Grok 4.20 or Qwen3.5-27B open source?
Grok 4.20 is listed under Proprietary. Qwen3.5-27B 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 reasoning mode, Grok 4.20 or Qwen3.5-27B?
Both Grok 4.20 and Qwen3.5-27B expose reasoning mode. 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.
Which is better for function calling, Grok 4.20 or Qwen3.5-27B?
Both Grok 4.20 and Qwen3.5-27B expose function calling. 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 Grok 4.20 and Qwen3.5-27B?
Grok 4.20 is available on xAI Console. Qwen3.5-27B is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-04-24. Data sourced from public model cards and provider documentation.