Posts tagged api-pricing

7 posts about api-pricing.

• Claude Haiku 5.5 Pricing: One Token Past 100K Costs 5x (Measured)

  October 9, 2026 · claude-haiku-5-5 · api-pricing · prompt-caching · long-context

  A 100,000-token prompt on Claude Haiku 5.5 billed $0.0100 and a 100,001-token one $0.0500. Cached tokens count toward the line. Three ways to stay under it.

• GPT-4 and GPT-3.5 Turbo Shut Down Oct 23: 3.5's Swap Costs About 5x

  October 5, 2026 · gpt-6 · gpt-5.6 · api-pricing · model-update

  OpenAI retires GPT-4, GPT-3.5 Turbo, o1 and o4-mini on Oct 23. Its GPT-3.5 Turbo swap cost $0.75 per 1,000 calls vs an estimated $0.15; GPT-6 Luna, $0.037.

• GPT-6 Luna vs GPT-5.6 Luna: Half the Price, Half the Words

  October 3, 2026 · gpt-6 · api-pricing · prompting · reasoning

  GPT-6 Luna wrote 0.55x the words of GPT-5.6 Luna on goal-only prompts, matched it with the parts named (74 vs 69 of 80), and cost $0.81 vs $1.61 per 1,000.

• GPT-6.1 Sol vs Claude Sonnet 5.5: Same $2/$10, Half the Cost per Task

  October 1, 2026 · gpt-6 · claude-sonnet-5-5 · api-pricing · reasoning

  GPT-6.1 Sol and Sonnet 5.5 both list at $2/$10. Sol cost 0.49x per task in our tests and $0.72 vs $2.74 at a matched index score; Sonnet scores higher at max.

• GPT-6 Astra Reasoning Effort: max Costs 2.3x low for the Same Answers

  September 8, 2026 · gpt-6 · reasoning · api-pricing · openai

  Measured on 11 verified tasks: none fails 17 of 33, disabled does not disable, max costs 2.3x low, and Astra is 1.6x GPT-5.6 Sol per correct answer.

• Long-Context Pricing Tiers: Up to 6.7x, and Gateways Never Show It

  September 2, 2026 · long-context · api-pricing · context-window · billing

  Through one aggregator, nine tiered models billed up to 6.7x past lines their pages never mention, and one endpoint billed 1.25x its listing. How to stay under.

• AI API Billing Units: 17 Meters from Tokens to PTU-Hours

  August 30, 2026 · billing · api-pricing · cost-observability

  The same API dollar is metered 17 ways: tokens, characters, minutes, GB-days, token-hours, PTU-hours. A field guide with the gotchas that bite billing code.