GPT-4.1 vs Claude 4.5 Sonnet
Compare pricing, context windows, and strengths for GPT-4.1 by OpenAI and Claude 4.5 Sonnet by Anthropic - and see how to put either to work in Appaca.
GPT-4.1
A highly capable non-reasoning model that excels at instruction following, tool calling, and broad domain knowledge with a 1M-token context window.
View GPT-4.1Claude 4.5 Sonnet
A frontier-level hybrid-reasoning model excelling at coding, long-horizon tasks, computer use, and domain reasoning with top-tier alignment and reliability.
View Claude 4.5 SonnetGPT-4.1 vs Claude 4.5 Sonnet at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-4.1 | Claude 4.5 Sonnet |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Model type | Text | Text |
| Context window | 1.05M tokens | 1M tokens |
| Input price | $2 / 1M tokens | $3 / 1M tokens |
| Output price | $8 / 1M tokens | $15 / 1M tokens |
| Status | Superseded by GPT-5.1 | Superseded by Claude 4.6 Sonnet |
How GPT-4.1 and Claude 4.5 Sonnet differ
What the numbers mean in practice when choosing between GPT-4.1 and Claude 4.5 Sonnet.
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GPT-4.1 is 33% cheaper on input tokens ($2 vs $3 per million), which adds up quickly in document-heavy workloads.
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GPT-4.1 is 47% cheaper on output tokens ($8 vs $15 per million) - the bigger factor for tools that generate long documents.
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Context windows are close: GPT-4.1 handles 1.05M tokens and Claude 4.5 Sonnet handles 1M tokens.
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GPT-4.1 has been superseded by GPT-5.1 - for new builds, consider the newer model first.
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Claude 4.5 Sonnet has been superseded by Claude 4.6 Sonnet - for new builds, consider the newer model first.
Strengths side by side
Where each model shines, according to benchmarks and provider positioning.
GPT-4.1
1. Smartest non-reasoning model
- Highest intelligence among models without a reasoning step.
- Great for tasks where speed + accuracy matter without deep chain-of-thought.
2. Excellent instruction following
- Very strong at structured tasks, formatting, and precise execution.
- Ideal for productized workflows and deterministic outputs.
3. Reliable tool calling
- Works smoothly with Web Search, File Search, Image Generation, and Code Interpreter.
- Supports MCP and advanced tool-enabled API flows.
4. Large 1M-token context window
- Allows extremely long conversations, large documents, and multi-file use cases.
- Handles context-heavy tasks without requiring chunking.
5. Low latency (no reasoning step)
- Faster responses than GPT-5 family when reasoning mode isn't required.
- More predictable timing for production use.
6. Multimodal input
- Accepts text + image.
- Output is text only.
7. Supports fine-tuning
- Can be fine-tuned for specialized tasks.
- Also supports distillation for smaller custom models.
Claude 4.5 Sonnet
1. Best-in-class coding performance
- #1 on SWE-bench Verified (77.2% standard, 82.0% high-compute).
- Excels at debugging, architecture, and multi-file code generation.
- Maintains coherence for extremely long tasks (30+ hours).
2. State-of-the-art computer use & agents
- Leads OSWorld at 61.4%.
- Strongest model for agentic workflows, multi-step tool use, and real computer control.
- Powering Claude Code, the new Claude Agent SDK, and Chrome agent actions.
3. Advanced reasoning & math
- Large improvements across reasoning-heavy benchmarks (AIME, MMMLU, τ2-bench, Terminal-Bench).
- Deep multi-step reasoning with extended or interleaved thinking.
4. High alignment & safety
- Most aligned Claude model to date with reduced deception, hallucinations, sycophancy, and harmful compliance.
- Strong protections against prompt injection for agentic tasks (ASL-3 safeguards).
5. Domain-expert performance
- Notable gains in finance, law, medicine, and STEM tasks.
- Trusted by early customers for long-context legal analysis, multi-file engineering, security research, and red-teaming.
Use GPT-4.1 or Claude 4.5 Sonnet - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-4.1 or Claude 4.5 Sonnet - 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-4.1 or Claude 4.5 Sonnet. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-4.1, test the same tool on Claude 4.5 Sonnet, 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-4.1 or Claude 4.5 Sonnet - connected to the tools you already use.
Related comparisons
See how GPT-4.1 and Claude 4.5 Sonnet stack up against other models in the directory.
FAQs
GPT-4.1 is generally cheaper: $2 input / $8 output per million tokens, versus $3 / $15 for Claude 4.5 Sonnet. Actual cost depends on how many tokens your workload reads and writes.
GPT-4.1 has the larger context window at 1.05M tokens, compared to 1M tokens for Claude 4.5 Sonnet. 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-4.1, test the same tool on Claude 4.5 Sonnet, 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-4.1, Claude 4.5 Sonnet, 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-4.1 or Claude 4.5 Sonnet
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.