AI Models · 5 min

AI Models Comparison April 2026

Claude Opus 4.6 vs GPT-5.4 vs Gemini 3.1 Ultra — benchmarks, pricing, and which to use for each task

Carlos Copisrad · 15 April 2026

AI Models April 2026

Claude Opus 4.6: 80.8% SWE-bench, preferred 47% in blind human tests. Best for coding, analysis, and agentic work. Pricing: input $15 / output $75 per million tokens.

GPT-5.4: Native computer use — autonomously navigates software. Best for task automation and multi-step workflows.

Gemini 3.1 Ultra: 2M token context window, true multimodal (text + image + audio + video). Cheapest flagship at input $2 / output $12 per million tokens. Best for large document processing and multimedia.

Claude Sonnet 4.6: 90% of Opus quality at 20% of the cost (input $3 / output $15). Best price-performance ratio for most production tasks.

Gemma 4: Google open-source under Apache 2.0. Free for commercial use. Best choice for self-hosted deployments where data privacy is critical.

How to choose

For enterprise automation with agentic workflows: Claude Opus 4.6. For large-scale document analysis: Gemini 3.1 Ultra. For cost-efficient production APIs: Claude Sonnet 4.6. For self-hosted setups: Gemma 4.

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