MODEL VERSIONS ON THIS PAGE HAVE MOVED — CHECKED 8 OCTOBER 2026
Current line, with published API pricing per million tokens:
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OpenAI — GPT-6 Sol (paid ChatGPT), GPT-6 Luna ($0.10 / $0.50), GPT-6.1 Sol ($2.00 / $10.00), GPT-6 Astra
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Anthropic — Claude Opus 5.5, Sonnet 5.5 ($2.00 / $10.00), Haiku 5.5 ($0.10 / $0.50 below 100K), Fable 5.1
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xAI — Grok 4.3 ($1.25 / $2.50), Grok 4.7 ($2.00 / $6.00)
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Google — Gemini 3.5 Flash-Lite ($0.30 / $2.50), Gemini 3.8 Flash ($0.75 / $3.75 to 31 Dec), Gemini 4 Argon
The comparison below is kept because the reasoning still holds — how these tiers trade price against capability has not changed. The version numbers and prices have.
Current pricing table →
QUICK VERDICT — BEFORE AUGUST 31 DEADLINE
● Sonnet 5 now: $2/$10/M — quality close to Opus 4.8 at a fraction of the cost
● Sonnet 5 after Aug 31: $3/$15/M
● Haiku 4.5: Faster, cheaper, but lower quality ceiling — best for classification, routing, simple extraction
● Best window: Now through August 31 — route Sonnet 5-quality work through Sonnet 5 at Haiku-adjacent pricing
● After August 31: Haiku 4.5 for speed/cost, Sonnet 5 for quality at $3/M, Opus 5 for hard reasoning at $5/M
August 31 action item
Any batch processing job, large content generation run, or high-volume analysis workload that can be completed before August 31 should be routed through Sonnet 5 at $2/M rather than Haiku 4.5 or Sonnet 5 after the price increase. The quality ceiling difference between Sonnet 5 and Haiku 4.5 is meaningful for tasks that require judgment, nuance, or longer output. The price difference at $2/M vs Haiku's pricing is smaller than it will be at $3/M after August 31.
Haiku 4.5 after August 31: Still the right choice for latency-sensitive classification, routing, structured extraction, and any task where response time matters more than nuanced quality — chatbot routing, tag generation, simple summarisation at scale.
Last updated July 31, 2026. Related: Claude model pricing full guide →