Anthropic Launches Claude Haiku 5.5 With Deep Price Cuts Before Planned IPO

What Anthropic announced

Anthropic made Claude Haiku 5.5 available on October 7, 2026, through its own Claude Platform as well as Amazon Web Services, Google Cloud and Microsoft Azure, according to VentureBeat and Yahoo Finance reporting on the release. Haiku is Anthropic's lightweight, lower-cost model line, positioned beneath the mid-tier Sonnet models and the top-end Opus and Mythos-class models in the company's lineup.

For requests under 100,000 tokens, Anthropic set input pricing at $0.10 per million tokens and output pricing at $0.50 per million tokens, VentureBeat reported, citing Anthropic's published rate card. Larger requests are billed at $0.50 per million input tokens and $2.50 per million output tokens. Cached-token rates are lower still, at $0.01 and $0.05 per million tokens for reads under and over the 100,000-token threshold, respectively.

Anthropic also gave Haiku 5.5 'effort controls,' letting developers set how many tokens the model spends on a given task, with medium effort as the default, per VentureBeat. The outlet reported that Haiku 5.5 scored 39.2% on the Terminal-Bench 4.0 agentic-coding benchmark at maximum effort, versus 20% at medium effort, and that it outperforms Haiku 4.5 across multiple evaluations while still trailing the mid-tier Sonnet 5.5 model.

VentureBeat noted that Haiku 5.5's base rate matches OpenAI's GPT-6 Luna on headline numbers, but Luna's higher-price surcharge only kicks in above 272,000 input tokens, versus 100,000 for Haiku, giving Luna an edge on mid-sized requests. Anthropic said the average cost reduction across typical traffic is about 75%, rising to 90% for shorter requests, which VentureBeat reported make up roughly 90% of Haiku 4.5's existing volume.

Why the October 15 deadline mattered

Forkast News reported that Anthropic had scheduled Haiku 4.5 for retirement on October 15, 2026, meaning the company needed a successor in place before that date or risk leaving its budget tier empty during the run-up to its IPO. According to Forkast, Anthropic faced a choice between holding Haiku's price at the old $1/$5 per-million-token level or moving it up to the roughly $2/$10 rate that has become the industry's mid-tier standard; instead it priced the new model below both options.

Forkast also reported that open-weight models listed on the OpenRouter marketplace average about $0.83 per million tokens — roughly 7.3 times cheaper than proprietary rivals — and already account for 61% of token traffic among top models, a dynamic it said is pushing proprietary developers like Anthropic toward the entry-level pricing floor.

The IPO backdrop

The release lands as Anthropic moves toward a stock market listing. Unite.AI, citing Reuters' review of Anthropic's IPO prospectus, reported that the company posted a $42 billion net loss for 2025, but that roughly $34 billion of that figure was a non-cash accounting charge tied to the rising estimated value of financing instruments that could convert into Anthropic shares. Excluding that charge, Unite.AI reported, Anthropic's operating loss was $8.06 billion in 2025, up from $2.98 billion in 2024, while revenue grew nearly twelvefold to about $4.6 billion.

Anthropic spent $7.33 billion on compute and infrastructure in 2025, triple the prior year, according to Unite.AI's summary of the filing. Separately, a Yahoo Finance analysis of the S-1 reported that Anthropic has committed to $518 billion in future cloud and infrastructure obligations, about 80% of it non-cancelable, including roughly $111.1 billion owed to Google, $110 billion to Amazon, $31.4 billion to Microsoft and $161.2 billion to Broadcom.

Unite.AI reported that the planned offering could value Anthropic above $2 trillion, more than double its $965 billion valuation from May 2026, and that Reuters' reporting pointed to a debut after the November 2026 U.S. midterm elections. Yahoo Finance's reporting on the Haiku launch separately described the anticipated IPO timeline as before Thanksgiving 2026. The Yahoo Finance report on the S-1 also noted that Anthropic's seven co-founders hold 50.1% of voting power through Class F shares in a Founder LLC structure and have pledged 80% of their equity to charity.

What is not yet known

Anthropic's S-1 prospectus had not yet appeared on the SEC's EDGAR database as of the reporting reviewed for this piece, and no final IPO date had been confirmed in the sources used — Reuters-sourced reporting pointed to a debut after the November 2026 midterms, while another report described the target as before Thanksgiving 2026. The exact final pricing strategy Anthropic will maintain for Haiku going forward, and how competitors will respond, also remains unsettled, according to Forkast's analysis of the pricing dynamics.