GPT-5 Mini vs Claude 4.5 Sonnet
Compare pricing, context windows, and strengths for GPT-5 Mini by OpenAI and Claude 4.5 Sonnet by Anthropic - and see how to put either to work in Appaca.
GPT-5 Mini
A faster, cost-efficient version of GPT-5 designed for well-defined tasks, precise prompts, and high-speed execution with strong reasoning.
View GPT-5 MiniClaude 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-5 Mini vs Claude 4.5 Sonnet at a glance
Specs and pricing side by side, from the Appaca AI models directory.
| Spec | GPT-5 Mini | Claude 4.5 Sonnet |
|---|---|---|
| Provider | OpenAI | Anthropic |
| Model type | Text | Text |
| Context window | 400K tokens | 1M tokens |
| Input price | $0.25 / 1M tokens | $3 / 1M tokens |
| Output price | $2 / 1M tokens | $15 / 1M tokens |
| Status | Current | Superseded by Claude 4.6 Sonnet |
How GPT-5 Mini and Claude 4.5 Sonnet differ
What the numbers mean in practice when choosing between GPT-5 Mini and Claude 4.5 Sonnet.
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GPT-5 Mini is 92% cheaper on input tokens ($0.25 vs $3 per million), which adds up quickly in document-heavy workloads.
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GPT-5 Mini is 87% cheaper on output tokens ($2 vs $15 per million) - the bigger factor for tools that generate long documents.
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Claude 4.5 Sonnet's 1M tokens context window is roughly 2.5x larger than GPT-5 Mini's 400K tokens, so it can work across bigger codebases, contracts, or archives in one pass.
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Claude 4.5 Sonnet has been superseded by Claude 4.6 Sonnet - for new builds, consider the newer model first.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-5 Mini
1. High reasoning performance
- Retains strong reasoning capabilities despite being a smaller, faster model.
- Suitable for tasks requiring accurate logic and structured thinking.
2. Fast and cost-efficient
- Optimized for speed, making it ideal for real-time or high-volume workloads.
- Far cheaper than GPT-5 while maintaining solid capability.
3. Great for well-defined tasks
- Excels when prompts are precise and objectives are clearly specified.
- More predictable and stable for deterministic workflows.
4. Multimodal input
- Accepts text + image as input.
- Outputs text only.
5. Tool support
- Works with Web Search, File Search, Code Interpreter, MCP.
- (Does not support Image Generation as a tool and does not support Computer Use.)
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-5 Mini or Claude 4.5 Sonnet - or both
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-5 Mini 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-5 Mini or Claude 4.5 Sonnet. No code, no API keys, no deployment.
Switch models without rebuilding
Start on GPT-5 Mini, 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-5 Mini or Claude 4.5 Sonnet - connected to the tools you already use.
Related comparisons
See how GPT-5 Mini and Claude 4.5 Sonnet stack up against other models in the directory.
FAQs
GPT-5 Mini is generally cheaper: $0.25 input / $2 output per million tokens, versus $3 / $15 for Claude 4.5 Sonnet. Actual cost depends on how many tokens your workload reads and writes.
Claude 4.5 Sonnet has the larger context window at 1M tokens, compared to 400K tokens for GPT-5 Mini. 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-5 Mini, 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-5 Mini, 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-5 Mini 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.