Claude 3.5 Sonnet

On a typical 70% input / 30% output mix, Claude 3.5 Sonnet blends to $6.60 per million tokens. That puts it above 74% of the 47 models tracked here, and 15 other models in the same mid-range tier undercut it. Tier is a capability label, not a price band — the spread inside one tier is often wider than the gap between tiers, which is why picking by tier alone tends to overspend.

Input runs $3.00 per million and output $15.00 — a 5.0x ratio. That ratio matters more than either number on its own: a summarisation or classification workload reads far more than it writes and will track the input price, while a code-generation or long-form writing workload inverts that and will track the output price. Compare models on the ratio your own traffic actually has, not on the input price alone.

The benchmark profile is unusually flat — creative work leads at 91/100 but only 3 points separate the strongest category from the weakest. That makes Claude 3.5 Sonnet a safe default for mixed workloads where you cannot predict in advance which capability a request will lean on, and a poor choice if you need a specialist.

The context window is 200K tokens and the throughput score is 95/100. Context only earns its keep if you fill it, and filling it is also what makes a request expensive — a large window is an option, not a discount. For a mid-range-tier model, judge the speed score against what you are doing: it decides everything for interactive chat and almost nothing for overnight batch work.

Worth checking before you commit: Claude Haiku 5.5 scores at least as well on combined coding and reasoning and blends to $0.22 per million against Claude 3.5 Sonnet's $6.60. That does not make Claude 3.5 Sonnet the wrong choice — context window, latency, vendor lock-in, and specific capabilities all sit outside a benchmark score — but it does mean the price difference needs a reason behind it.

The closest comparison is Gemini 3.1 Pro from Google, at $5.00 per million against $6.60. 12 models in this tier score higher on combined coding and reasoning, which is the useful framing: the question is rarely whether a model is good, it is whether it is the cheapest thing that is good enough for the specific work you are sending it.