GPT-2 Medium vs Llama 2 7B Chat
GPT-2 Medium (2019) and Llama 2 7B Chat (2023) are compact production models from OpenAI and AI at Meta. GPT-2 Medium ships a 1k-token context window, while Llama 2 7B Chat ships a 4k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads. It focuses on practical selection signals rather than broad model-family marketing.
Llama 2 7B Chat fits 4x more tokens; pick it for long-context work and GPT-2 Medium for tighter calls.
Decision scorecard
Local evidence first| Signal | GPT-2 Medium | Llama 2 7B Chat |
|---|---|---|
| Best for | general production evaluation | provider-routed production |
| Decision fit | General | Classification and JSON / Tool use |
| Context window | 1k | 4k |
| Cheapest output | - | $0.25/1M tokens |
| Provider routes | 0 tracked | 10 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Use GPT-2 Medium when your own prompt tests beat the comparison signals; the local data does not show a decisive standalone advantage yet.
- Llama 2 7B Chat has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Llama 2 7B Chat has broader tracked provider coverage for fallback and route flexibility.
- Llama 2 7B Chat uniquely exposes Structured outputs in local model data.
- Local decision data tags Llama 2 7B Chat for Classification and JSON / Tool use.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-2 Medium
Unavailable
No complete token price in local provider data
Llama 2 7B Chat
$103
Cheapest tracked route/tier: Replicate API
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for GPT-2 Medium and Llama 2 7B Chat; plan for SDK, billing, or endpoint changes.
- Llama 2 7B Chat adds Structured outputs in local capability data.
- No overlapping tracked provider route is sourced for Llama 2 7B Chat and GPT-2 Medium; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Structured outputs before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2019-02-14 | 2023-07-18 |
| Context window | 1k | 4k |
| Parameters | 355M | 7B |
| Architecture | Decoder Only | Decoder Only |
| License | MITOSI-approved | Llama 2 Community |
| Openness | Open source | Open weights |
| Weights | Unknown | Available |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: permitted | Commercial use: conditional |
| Knowledge cutoff | 2017-12 | 2022-09 |
Pricing and availability
| Pricing attribute | GPT-2 Medium | Llama 2 7B Chat |
|---|---|---|
| Input price | - | $0.05/1M tokens |
| Output price | - | $0.25/1M tokens |
| Providers | - |
Capabilities
| Capability | GPT-2 Medium | Llama 2 7B Chat |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | No |
| JSON / Tool use | No | No |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
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Last reviewed: 2026-07-09. Data sourced from public model cards and provider documentation.