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Which AI Model Should I Use?

Tell us your use case and what matters most — quality, cost, or speed — and get a clear top pick plus two alternatives, with the reasoning and ballpark pricing. No signup.

Top pick

Claude Opus 4.8

Anthropic

Anthropic's most capable — top-tier coding, long-horizon agents, 1M context.

$5 / $25 per 1M (in/out)

Claude Sonnet 4.6

Anthropic

Best balance of speed, cost and intelligence; same 1M context at ~60% of Opus.

$3 / $15 per 1M (in/out)

GPT-4o

OpenAI

Well-rounded multimodal workhorse; native vision and broad tooling.

$2.5 / $10 per 1M (in/out)

Prices are a June 2026 snapshot (USD per 1M tokens). Closed-model rates are official standard-tier; open-model rates are representative hosted prices — the weights are free to self-host. Gemini 2.5 Pro rises to $2.50/$15 over 200K-token prompts. Confirm live pricing before relying on a figure.

Frequently asked

What's the best AI model for coding in 2026?

For top quality, Claude Opus 4.8 ($5 / $25 per 1M in/out, 1M context) leads on agentic coding. For the best value, Claude Sonnet 4.6 ($3 / $15) or the open DeepSeek V3 (~$0.25 / $0.34 hosted, free to self-host) deliver frontier-class coding for far less.

Which AI model is cheapest?

Among capable hosted models, Mistral Small 3.x ($0.10 / $0.30 per 1M) and GPT-4o mini ($0.15 / $0.60) are the cheapest, with Gemini 2.5 Flash ($0.30 / $2.50) cheap for huge contexts. If you self-host open weights (Llama, Qwen, DeepSeek, Mistral), token cost is effectively zero — you only pay for hardware.

What's the best model I can run fully locally / privately?

For a single consumer GPU, Mistral Small 3.x (~24B, Apache 2.0) is the most practical. For frontier-class quality on a multi-GPU box, DeepSeek V3, Llama 4 Maverick, or Mistral Large 3 (all open weights) are the strongest self-hostable options. Mid-range: Llama 3.3 70B or Qwen2.5 72B fit a single high-VRAM GPU.

Which model has the biggest context window?

Claude Opus 4.8, Claude Sonnet 4.6, Gemini 2.5 Pro/Flash, and the open Llama 4 Maverick all offer a 1,000,000-token context. For an open, self-hostable flagship, Mistral Large 3 offers 256K+.

Open vs. closed models — when should I pick open weights?

Pick open weights (Llama, Qwen2.5, DeepSeek, Mistral) when you need data privacy, on-prem/air-gapped deployment, no per-token fees at scale, or full control. Pick closed (Claude, GPT-4o, Gemini) when you want the highest ceiling, native vision, managed reliability, and zero ops.

How to pick the right model

There is no single best model; there is the best model for a given task, budget, and constraint. Picking well means matching the model to what the job actually needs rather than always reaching for the largest one.

Match capability to the task

Hard reasoning, long agentic work, and tricky code reward a top-tier model. Classification, extraction, short replies, and high-volume calls usually run just as well on a smaller, cheaper, faster model. Using a frontier model for simple work mostly wastes money and latency.

Weigh cost, speed, and context

Beyond raw quality, models differ in price per token, response speed, context-window size, and whether they are multimodal or open-weight. A cheaper model with a large context can beat a pricier one for document work; a fast small model can beat a slow large one for interactive use.

Open or closed

Open-weight models can run locally for data control and zero per-token cost, at the price of hosting them yourself. Closed API models are simplest to use and often the most capable. The right pick depends on your constraints, not just a benchmark score.

Related reading

Go deeper on how this works and what to pick.

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