GPT-3.5 Turbo vs Claude 4.1 Opus
Compare pricing, context windows, and strengths for GPT-3.5 Turbo by OpenAI and Claude 4.1 Opus by Anthropic - and see how to put either to work in Appaca.
GPT-3.5 Turbo
Legacy lightweight GPT model for cheap text generation and chat tasks; now replaced by faster, smarter, and cheaper 4o-mini models.
View GPT-3.5 TurboClaude 4.1 Opus
A refined flagship model with improved coding, reasoning, research depth, and agentic task performance over Opus 4.
View Claude 4.1 OpusGPT-3.5 Turbo vs Claude 4.1 Opus at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-3.5 Turbo | Claude 4.1 Opus |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Model type | Text | Text |
| Context window | 16.4K tokens | 1M tokens |
| Input price | $0.5 / 1M tokens | $15 / 1M tokens |
| Output price | $1.5 / 1M tokens | $75 / 1M tokens |
| Status | Current | Superseded by Claude 4.5 Opus |
How GPT-3.5 Turbo and Claude 4.1 Opus differ
What the numbers mean in practice when choosing between GPT-3.5 Turbo and Claude 4.1 Opus.
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GPT-3.5 Turbo is 97% cheaper on input tokens ($0.5 vs $15 per million), which adds up quickly in document-heavy workloads.
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GPT-3.5 Turbo is 98% cheaper on output tokens ($1.5 vs $75 per million) - the bigger factor for tools that generate long documents.
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Claude 4.1 Opus's 1M tokens context window is roughly 61.0x larger than GPT-3.5 Turbo's 16.4K tokens, so it can work across bigger codebases, contracts, or archives in one pass.
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Claude 4.1 Opus has been superseded by Claude 4.5 Opus - for new builds, consider the newer model first.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
GPT-3.5 Turbo
1. Extremely low-cost text model
- One of the cheapest legacy models available.
- Suitable for very high-volume workloads with simple requirements.
2. Good for lightweight NLP tasks
- Classification, summarization, rewriting, paraphrasing, intent detection.
- Works for simple logic tasks and short reasoning sequences.
3. Works well for basic chatbots
- Optimized for Chat Completions API, originally powering early ChatGPT use cases.
- Good for rule-based or templated conversation flows.
4. Stable and predictable outputs
- Legacy behavior makes it suitable for systems built years ago that rely on its quirks.
- Good for backward compatibility or long-term enterprise pipelines.
5. Supports fine-tuning
- Useful for teams maintaining older fine-tuned GPT-3.5 models.
- Allows domain-specific compression of older datasets.
6. Limited capabilities compared to newer models
- No vision, no audio, no streaming, and no function calling.
- Much weaker reasoning and correctness vs GPT-4o mini or GPT-5.1.
7. Small context window (16K)
- Limited for multi-document tasks or long conversations.
- Best used for short, simple prompts or structured tasks.
8. Recommended migration path
- OpenAI explicitly recommends using GPT-4o mini instead.
- 4o mini is cheaper, smarter, faster, multimodal, and far more capable.
Claude 4.1 Opus
1. Advanced Coding Performance
Achieves 74.5% on SWE-bench Verified, improving the Claude family's state-of-the-art coding abilities.
Stronger at:
- Multi-file code refactoring
- Large codebase debugging
- Pinpointing exact corrections without unnecessary edits
Outperforms Opus 4 and shows gains comparable to jumps seen in past major releases.
2. Improved Agentic & Research Capabilities
- Better at maintaining detail accuracy in long research tasks.
- Enhanced agentic search and step-by-step problem solving.
- Performs reliably across complex multi-turn reasoning tasks.
3. Validated by Real-World Users
- GitHub: Better multi-file refactoring and code adjustments.
- Rakuten Group: High precision debugging with minimal collateral changes.
- Windsurf: One standard deviation improvement on their junior dev benchmark - similar magnitude to Sonnet 3.7 → Sonnet 4.
4. Hybrid-Reasoning Benchmark Improvements
- Improvements across TAU-bench, GPQA Diamond, MMMLU, MMMU, AIME (with extended thinking).
- Stronger robustness in long-context reasoning tasks.
Use GPT-3.5 Turbo or Claude 4.1 Opus - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-3.5 Turbo or Claude 4.1 Opus - connected to your real data and ready for your whole team. No code, no deployment.
Describe it, and it's built
Tell the Appaca agent the internal tool you need and it builds a working app powered by GPT-3.5 Turbo or Claude 4.1 Opus. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-3.5 Turbo, test the same tool on Claude 4.1 Opus, and keep whichever performs better - the rest of your app stays exactly as it is.
Automated for the whole team
Schedule tools to run on autopilot - daily digests, weekly reports, real-time triggers - and share them with your whole team from one workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by GPT-3.5 Turbo or Claude 4.1 Opus - connected to the tools you already use.
Related comparisons
See how GPT-3.5 Turbo and Claude 4.1 Opus stack up against other models in the directory.
FAQs
GPT-3.5 Turbo is generally cheaper: $0.5 input / $1.5 output per million tokens, versus $15 / $75 for Claude 4.1 Opus. Actual cost depends on how many tokens your workload reads and writes.
Claude 4.1 Opus has the larger context window at 1M tokens, compared to 16.4K tokens for GPT-3.5 Turbo. A larger window means the model can consider more text at once - useful for long contracts, codebases, or months of records.
It depends on the job. Compare the pricing, context window, and strengths above against your workload - and remember the choice isn't permanent. In Appaca you can build a tool on GPT-3.5 Turbo, test the same tool on Claude 4.1 Opus, and switch at any time without rebuilding anything.
Yes. Appaca is a no-code AI workspace: describe the internal tool your team needs and the Appaca agent builds it as a working app powered by GPT-3.5 Turbo, Claude 4.1 Opus, or any other model in the directory - with a built-in database, team access, and integrations. No API keys to wire up and nothing to deploy.
Build AI tools with GPT-3.5 Turbo or Claude 4.1 Opus
Describe the tool your team needs and get a working app powered by the model you choose - with a built-in database, team access, and integrations. No code, no deployment.