Best LLMs for Finance (2026)
Large language models for financial analysis, report generation, earnings summarization, and quantitative research — ranked by numerical accuracy and reasoning depth.
Why Claude Sonnet 4 is Best for Finance
Claude Sonnet 4 ranks highest for this use case based on Arena ELO score, benchmark performance, and capability coverage. It provides the best combination of quality, speed, and reliability for these specific tasks.
Cost Estimate
For a typical workload (~50M tokens/month, 60% input / 40% output), the cheapest qualifying model (DeepSeek R1) costs approximately $71.00/month. The most capable model may cost more but delivers higher quality results.
Price vs Quality for Finance
Anthropic
Deepseek
Google
Openai
Top 5 Models Compared
| Rank | Model | Provider | Input $/M | Output $/M | Arena ELO | Speed (tok/s) |
|---|---|---|---|---|---|---|
| #1 | Claude Sonnet 4 | Anthropic | $3.00 | $15.00 | 1280 | 78 |
| #2 | GPT-4o | OpenAI | $2.50 | $10.00 | 1260 | 95 |
| #3 | o4-mini | OpenAI | $1.10 | $4.40 | 1350 | 60 |
| #4 | Gemini 2.5 Pro | $1.25 | $10.00 | 1430 | 70 | |
| #5 | Claude Opus 4 | Anthropic | $5.00 | $25.00 | 1504 | 50 |
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