Llama 2 7B vs Qwen3.5-4B
Llama 2 7B (2023) and Qwen3.5-4B (2026) are compact production models from AI at Meta and Alibaba. Llama 2 7B ships a 4k-token context window, while Qwen3.5-4B ships a 262k-token context window. On Google-Proof Q&A, Qwen3.5-4B leads by 40.3 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Qwen3.5-4B fits 66x more tokens; pick it for long-context work and Llama 2 7B for tighter calls.
Decision scorecard
Local evidence first| Signal | Llama 2 7B | Qwen3.5-4B |
|---|---|---|
| Best for | general production evaluation | multimodal apps |
| Decision fit | Coding and Classification | Coding, Agents, and Long context |
| Context window | 4k | 262k |
| Cheapest output | $0.20/1M tokens | - |
| Provider routes | 1 tracked | 0 tracked |
| Shared benchmarks | 1 shared | Google-Proof Q&A leader |
Decision tradeoffs
- Llama 2 7B has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags Llama 2 7B for Coding and Classification.
- Qwen3.5-4B holds a shared-benchmark lead on Google-Proof Q&A, ahead by 40.3 points.
- Qwen3.5-4B has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Qwen3.5-4B uniquely exposes Vision and Multimodal in local model data.
- Local decision data tags Qwen3.5-4B for Coding, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Llama 2 7B
$210
Cheapest tracked route/tier: Fireworks AI
Qwen3.5-4B
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Llama 2 7B and Qwen3.5-4B; plan for SDK, billing, or endpoint changes.
- Qwen3.5-4B adds Vision and Multimodal in local capability data.
- No overlapping tracked provider route is sourced for Qwen3.5-4B and Llama 2 7B; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Vision and Multimodal before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2023-07-18 | 2026-03-02 |
| Context window | 4k | 262k |
| Parameters | 7B | 4B |
| Architecture | Decoder Only | - |
| License | Llama 2 Community | Apache 2.0OSI-approved |
| Openness | Open weights | Open source |
| Weights | Available | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | 2022-09 | - |
Pricing and availability
| Pricing attribute | Llama 2 7B | Qwen3.5-4B |
|---|---|---|
| Input price | $0.20/1M tokens | - |
| Output price | $0.20/1M tokens | - |
| Providers | - |
Capabilities
| Capability | Llama 2 7B | Qwen3.5-4B |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | No |
| JSON / Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Llama 2 7B | Qwen3.5-4B |
|---|---|---|
| Google-Proof Q&A | 35.9 | 76.2 |
Continue comparing
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Last reviewed: 2026-07-09. Data sourced from public model cards and provider documentation.