LLM Comparison
Claude Sonnet 5.5 vs Inflection 3 Productivity
Side-by-side specs, pricing & capabilities · Updated September 2026
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | ||
| Family | Claude Sonnet | Inflection |
| Status | Current | Current |
| Release Date | Sep 2026 | Oct 2024 |
| Context Window | 1.0M tokens | 8K tokens |
| Input Price | $2.00/M tokens | $2.50/M tokens |
| Output Price | $10.00/M tokens | $10.00/M tokens |
| Pricing Notes | Anthropic Claude API standard tier, USD per million tokens: $2 input, $10 output; 5-minute cache writes $2.50, 1-hour cache writes $4, cache reads $0.20. Batch API gives 50% off input and output. A 300K output limit is available only for Message Batches API with the output-300k-2026-03-24 beta header; standard maximum output is 128K. Provider and regional terms may vary. | — |
| Capabilities | textvisionreasoningcodingtool-uselong-contextcontext-caching | textcode |
| Training Cutoff | 2026-06 | — |
| Max Output | 128K tokens | 1K tokens |
| API Identifier | claude-sonnet-5-5 | inflection/inflection-3-productivity |
| Benchmarks | ||
| Artificial Analysis Intelligence Index v4.3.2 | 55.9779549012591artificial-analysis | — |
| View Claude Sonnet 5.5 | View Inflection 3 Productivity | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| Claude Sonnet 5.5Cheapest | $2.00 | $5.00 | $7.00 | — |
| Inflection 3 Productivity | $2.50 | $5.00 | $7.50 | +7% |
Anthropic
Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's proprietary adaptive-reasoning model. The Claude API identifier is claude-sonnet-5-5. It accepts text and images, returns text, has a 1,000,000-token context window and a 128,000-token standard output limit. Anthropic lists standard API input and output pricing at $2 and $10 per million tokens.
Inflection AI
Inflection 3 Productivity
Inflection 3 Productivity is a large language model from Inflection AI. Supports up to 8,000 token context window. Available from $2.50/M input tokens.
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