GPT-6 Astra: what the launch changes and what it costs
Updated September 9, 2026 · LW Forge
A practical overview of GPT-6 Astra: its main capabilities, API price, long-context surcharge, rollout status and the teams that should test it first.
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Practical guides on AI API pricing, tokens and cost planning. Every article links to the calculator that lets you run the numbers for your own case.
Claude Fable 5.1 Pricing: $10/$50 Per Million Tokens, Plus a 75% Cache Cut
Updated September 7, 2026 · LW Forge
Claude Fable 5.1 pricing lands at $10 per million input tokens and $50 output, with cache reads cut 75% to $0.25. Compared to Opus 5, Sonnet 5, and Haiku 4.5, worked in real dollars.
Gemini 3.7 Flash Launches at Half the Price of 3.5 — But Only Until 2027
Updated August 31, 2026 · LW Forge
Google's new Gemini 3.7 Flash cuts input and output pricing roughly in half versus 3.5 Flash, confirmed on Google's own pricing page — but the rate is introductory and reverts on January 1, 2027. Here's the real math.
GPT Sol or GPT Terra: which one is cheaper?
Updated August 31, 2026 · LW Forge
Compare GPT-5.6 Sol and GPT-5.6 Terra by token, task, and workload. See when Terra is enough and when Sol can justify its premium.
Hugging Face in Talks to Sell to Nvidia for $13B — After Rejecting Its $500M Offer
Updated August 29, 2026 · LW Forge
Business Insider and The Information report Nvidia is closing in on buying Hugging Face for around $13B, months after the open-source hub turned down a smaller Nvidia investment. Here's what's confirmed and what isn't.
Reasoning Tokens Cost: How Thinking Models Impact Your API Bill
Updated August 25, 2026 · LW Forge
Why reasoning and thinking tokens are billed as expensive output tokens, how hidden chains of thought multiply API costs, and strategies to control your budget.
Claude Sonnet 5's Launch Price Is Now Permanent
Updated August 12, 2026 · LW Forge
Anthropic confirmed the $2/$10 introductory rate for Sonnet 5 won't revert to $3/$15 on September 1 as originally planned. Here's what actually changes for budgets, the Haiku comparison, and every calculator on this site.
Batch API: real 50% savings, or a promise with a catch?
Updated August 12, 2026 · LW Forge
OpenAI and Anthropic both cut prices in half for the Batch API, no exceptions and no fine print on the rate. The catch isn't the discount — it's whether your workload can tolerate a 24-hour wait, and most people size that wrong.
Why Portuguese uses more tokens than English (and what to do about it)
Updated August 12, 2026 · LW Forge
Portuguese costs more tokens than English for the exact same sentence — not because it has more words, but because of how tokenizers are trained. Here is the actual size of the gap and three ways to shrink your bill.
Claude Opus, Sonnet or Haiku: which tier to use and what each really costs
Updated August 12, 2026 · LW Forge
The three Claude tiers are priced 5:2:1 for identical traffic, so the choice multiplies your whole bill by a constant. Here's the price table, a worked monthly example, and the use cases where each tier earns its rate.
Sonnet 5 vs Haiku 4.5: when the cheaper Claude is enough
Updated August 12, 2026 · LW Forge
Sonnet costs exactly 2x Haiku on identical traffic. Here's a worked pipeline where that gap is $1,100 a month, the tasks where Haiku matches Sonnet in practice, and a routing pattern that captures most of the savings without the quality risk.
Free AI for studying: what you actually get without paying
Updated August 4, 2026 · LW Forge
ChatGPT, Claude and Gemini all have a free tier, and all three ration it differently — by messages, by a rolling time window, or by compute. Here is what a student or self-learner can realistically run on free access in 2026, and when it stops being enough.
GLM-5.2 API pricing vs GPT: what an open-weights flagship really costs
Updated August 12, 2026 · LW Forge
GLM-5.2 lists at $1.40/$4.40 direct and about half that through aggregators. A worked comparison against GPT-5.6 and Claude, the cache detail that quietly narrows the gap, and the volume where self-hosting the open weights finally beats the API.
GPU cloud pricing compared: what an H100 really costs per hour
Updated August 12, 2026 · LW Forge
The same H100 rents for $1.65 or $11.06 an hour depending on where you look. A provider-by-provider table, the spot/reserved discounts that actually apply, and the breakeven math that decides whether self-hosting beats an API bill.
Kimi K3 API pricing: open weights that now cost more than Sonnet 5
Updated August 12, 2026 · LW Forge
Moonshot's 2.8T open-weights flagship lists at $3/$15 — 40% under Opus 4.8, and, since Anthropic made Sonnet 5's launch price permanent, 50% above it too. A worked comparison, what the 1M context window is actually worth against Claude's 200k, and where the premium is justified.
Nemotron 3 and the open-weights math: when 'free' actually costs less
Updated August 4, 2026 · LW Forge
Nemotron 3 Ultra lists at $0.50/$2.20 per million tokens and has a genuinely free tier. What that free tier costs you in data terms, what the same model costs to self-host on eight GPUs, and why open weights and a cheap API solve different problems.
What the OpenAI API actually costs in Brazilian reais
Updated August 4, 2026 · LW Forge
OpenAI bills in dollars, but the invoice lands in reais with IOF, a card spread and — for companies — a stack of import taxes on top. The real multiplier is not the exchange rate, and it is closer to 1.5x than to 1.05x.
RAG cost per query: where the money actually goes
Updated August 12, 2026 · LW Forge
A worked breakdown of what one RAG query costs — embedding, retrieved context and generation — on 10,000 queries a month. The embedding is a rounding error, the answer length is not, and the re-embedding bill is the one nobody budgets for.
Context window in practice: what actually fits in 200k vs. 1M tokens
Updated August 3, 2026 · LW Forge
128k was the ceiling not long ago; 1M is standard on several models now. What that translates to in pages and books, what it costs to fill, and why bigger isn't automatically better.
How many pages can GPT actually read? The direct answer, plus a table
Updated August 3, 2026 · LW Forge
A 200k window holds about 400 dense pages, a million-token window about 2,000 — the real number for your document depends on density, and here's how to check it.
What does it actually cost to summarize a 300-page PDF with AI?
Updated July 27, 2026 · LW Forge
The token math behind PDF summarization, whether a 300-page document even fits in one request, and when the free chat apps stop being enough.
Prompt caching: when it slashes your bill (and when it doesn't)
Updated July 27, 2026 · LW Forge
How OpenAI's automatic caching and Anthropic's explicit breakpoints actually price out, a worked example showing the savings, and the three situations where caching quietly does nothing.
The cheapest LLM API in 2026: GPT-5.4-nano vs Claude Haiku vs DeepSeek Flash
Updated July 20, 2026 · LW Forge
The budget tiers of OpenAI, Anthropic, Google and DeepSeek compared honestly: list prices, what 'cheap per token' hides, and how to pick the cheapest model that's still correct.
Is DeepSeek worth it? The real cost vs GPT and Claude
Updated July 20, 2026 · LW Forge
DeepSeek's V4 lineup undercuts Western flagships by 10-40x on list price. What you actually trade away — latency, ecosystem, data governance — and the workloads where it wins outright.
ChatGPT API vs subscription: which one actually pays off?
Updated July 13, 2026 · LW Forge
What $20/month buys in API tokens, where the breakeven sits for each GPT-5.6 tier, and a simple rule for choosing between ChatGPT Plus, Claude Pro and pay-per-use.
Claude Sonnet 5 vs GPT-5.6: a fair cost comparison
Updated August 12, 2026 · LW Forge
Why price-per-million comparisons mislead, how the Anthropic and OpenAI tiers actually map onto each other, and how to measure cost per task instead of cost per token.
How much does it cost to run a chatbot with GPT-5? Three real scenarios
Updated July 6, 2026 · LW Forge
Open math for a support bot, an internal assistant and a complex agent on the GPT-5.6 family — plus the history trap and caching discounts that change the bill.
Tokens explained: why 1,000 words ≠ 1,000 tokens
Updated July 6, 2026 · LW Forge
What tokens actually are, why every AI provider bills in them, and how to convert words, characters and pages into tokens without getting your budget wrong.