Claude Opus 5.5 and Sonnet 5.5, GPT-6 Astra and GPT-6.1 Sol, Gemini 3.8 Flash and Grok 4.7 all shipped since our August issue. A research-grounded October 2026 playbook for engineering leads: which model for which job, what it costs, and why the combined bill is now the hard part.
A research-grounded October 2026 briefing on the frontier, covering early August to October 6: GPT-6 and Claude 5.5, Gemini's January 2027 price cliff, Meta's pay-with-your-data tier, open weights under custom licences, and the retirement dates that will force model swaps before spring.
GPT Image 2.5 takes both Arena boards, Nano Banana 2.1 halves Google's per-image price, FLUX 3 Image finally ships, and Imagen 4 is gone from the Gemini API. A research-grounded October 2026 guide to which image model fits which job, and what it costs.
What changed in LLM API pricing between August and October 2026, what it means for your bill, and which model swaps actually cut cost, with worked monthly and per-task examples plus the full rate card for closed APIs, open-weight models and hosts.
Claude Opus 5 reset the top of the coding stack at half the price of Fable 5, GPT-5.6 Sol holds the terminal benchmarks, and Grok 4.5 arrived trained on Cursor. A research-grounded August 2026 playbook for routing models by role — and keeping the bill visible. A newer month is available.
A research-grounded August 2026 briefing on the frontier: Anthropic's Claude Opus 5 at half the price of Fable 5, GPT-5.6 going generally available then getting an 80% price cut, Grok 4.5, Meta's return — and what a cheaper frontier does to your bill. A newer month is available.
A research-grounded August 2026 guide to AI image models: FLUX 3 goes multimodal, Microsoft's MAI-Image-2.5-Pro arrives token-priced, Nano Banana and GPT Image 2 hold the arenas — and why per-image pricing is quietly being replaced by per-token billing. A newer month is available.
Every major LLM API and open-weight model priced per million input and output tokens, with what changed in August 2026 and which swaps actually cut cost. A newer month is available.
A research-grounded July 2026 briefing on the frontier: OpenAI's GPT-5.6 (Sol, Terra, Luna), Anthropic's Claude Fable 5 and Mythos 5, where Gemini, Grok, and open models sit — and the new reality of US-government-gated model access.
Image models compared on quality and cost per image as they stood in July 2026, with the trade-offs that matter in production. A newer month is available.
A research-grounded July 2026 map of LLM pricing: OpenAI, Anthropic, Google, xAI, Amazon, and Mistral APIs, the leading open-weight models, and what open-model hosts (Together AI, Groq, Fireworks, Hugging Face, DeepInfra, and more) actually charge per token.
OpenAI and Anthropic rarely differ by only list price. Compare GPT-5.5 and Claude pricing, long-context behavior, batch discounts, and when each provider is actually cheaper in production.
The cheapest AI API depends on the workload. Compare low-cost options for chat, retrieval-heavy RAG, and coding tasks, plus the pricing traps that make a 'cheap' model expensive in production.
Current per-1M-token prices for OpenAI, Anthropic, Gemini, Grok, Mistral and Bedrock in one table, refreshed every six hours and linked to official pricing.
A practical comparison of LLM latency across major providers and model families, including when ultra-low latency matters (voice, realtime UX) and when slower responses are acceptable.
Choose when to retrieve vs stuff more context. Embeddings and retrieval have different cost shapes than long-context prompting—this guide shows which wins for your workload.
Seat pricing and usage pricing reward opposite team shapes. How to work out which one fits yours before you commit, and why the answer changes as agentic use grows.
Frameworks for comparing model cost, latency, and quality so teams can choose the right model for each workload.
What guides are in the Model pricing and selection topic hub?
The Best Coding Models in October 2026 — and How to Route Them, The Latest in LLMs, October 2026: GPT-6, Claude 5.5, and a Deprecation Wave, The Latest in AI Image Generation, October 2026: Models, Quality, and Cost, LLM Model Pricing in October 2026: What Changed and Which Swaps Cut Cost, The Best Coding Models in August 2026 — and How to Actually Use Them.
How does StackSpend help with Model pricing and selection?
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