API cost decision in 10 seconds

NewClaude Haiku 5.5 vs Ternary Bonsai 2 27B

Pick Ternary Bonsai 2 27B for lower cost; pick Claude Haiku 5.5 only if the larger context window matters more.

Page updated: 2026-10-07T19:07:26Z Data confirmed: 2026-10-15T02:07:54Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Ternary Bonsai 2 27B for lower cost; pick Claude Haiku 5.5 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Ternary Bonsai 2 27B is estimated at $0.33 vs $0.35 for Claude Haiku 5.5, saving $0.02 (7.1% lower).

Cost-first pickTernary Bonsai 2 27B

Context-first pickClaude Haiku 5.5

Sample savings$0.027.1%

10x traffic gap$0.25

Claude Haiku 5.5 has more context, but Ternary Bonsai 2 27B saves $0.02 on the standard workload. At 10x that traffic, the same price gap is about $0.25. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Ternary Bonsai 2 27B stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Claude Haiku 5.5	Ternary Bonsai 2 27B
Input-heavy / RAG	5M input + 500K output	Ternary Bonsai 2 27B	$0.75	$0.62
Balanced workload	1M input + 1M output	Ternary Bonsai 2 27B	$0.6	$0.57
Output-heavy chatbot	1M input + 5M output	Ternary Bonsai 2 27B	$2.6	$2.58

Cheaper input Ternary Bonsai 2 27B $0.1 vs $0.075 / 1M

Ternary Bonsai 2 27B is $0.03 cheaper per 1M input tokens (25% lower; 1.33x difference).

Cheaper output Tie $0.5 vs $0.5 / 1M

Both models report the same output price at $0.5 per 1M tokens.

Larger context Claude Haiku 5.5 1M vs 262.14K

Claude Haiku 5.5 has 737.86K more context (3.81x larger).

Sample workload Ternary Bonsai 2 27B $0.35 vs $0.33

Ternary Bonsai 2 27B is $0.02 cheaper on the standard workload (7.1% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Claude Haiku 5.5 Calculating… Estimated API cost

Ternary Bonsai 2 27B Calculating… Estimated API cost

Cheaper for this workload Calculating… Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Ternary Bonsai 2 27B has the lower input price; both models tie on output price; Claude Haiku 5.5 offers the larger context window. For the 1M input plus 500K output sample, Ternary Bonsai 2 27B is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.35 for Claude Haiku 5.5 and $0.33 for Ternary Bonsai 2 27B.

Best Fit

Choose Claude Haiku 5.5 when you care most about larger context window.

Choose Ternary Bonsai 2 27B when you care most about lower input-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Ternary Bonsai 2 27B is estimated at $0.33 vs $0.35 for Claude Haiku 5.5, saving $0.02 (7.1% lower).
Ternary Bonsai 2 27B is $0.02 cheaper on the standard workload (7.1% lower).
Ternary Bonsai 2 27B is $0.03 cheaper per 1M input tokens (25% lower; 1.33x difference).
Both models report the same output price at $0.5 per 1M tokens.
Claude Haiku 5.5 has 737.86K more context (3.81x larger).

Head-to-Head Specs

Feature	NewClaude Haiku 5.5 (Anthropic)	Ternary Bonsai 2 27B (PrismML)
Input Price prompt tokens per 1M	$0.1	$0.075
Completion Price per 1M tokens	$0.5	$0.5
Sample Workload Cost 1M input + 500K output	$0.35	$0.33
Context Window	1M	262.14K
Release Date	2026-10-07	2026-09-18

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Ternary Bonsai 2 27B	On the standard 1M input plus 500K output workload, Ternary Bonsai 2 27B is estimated at $0.33 vs $0.35 for Claude Haiku 5.5, saving $0.02 (7.1% lower).
High-volume input processing	Ternary Bonsai 2 27B	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Tie	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Claude Haiku 5.5	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Claude Haiku 5.5 (batch) can replace Claude Haiku 5.5 when lower sample workload cost matters most: $0.17.

Larger context near this budget

MiMo-V2.6-Flash offers 1.05M context with $0.28 sample workload cost.
GPT-6 Luna offers 1.05M context with $0.35 sample workload cost.
GPT-6 Luna Pro offers 1.05M context with $0.35 sample workload cost.
GPT-6 Luna Pro (batch) offers 1.05M context with $0.17 sample workload cost.

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Cheaper alternatives

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Larger context alternatives

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Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

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Anthropic catalog

Review all tracked Anthropic models before deciding whether this matchup is the right shortlist.

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PrismML catalog

Check other PrismML models with comparable pricing, context, or release timing.

Open PrismML models

Claude Haiku 5.5

Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and...

Ternary Bonsai 2 27B

Bonsai 2 27B is a 27B-parameter reasoning model from PrismML derived from Qwen3.8-27B. It supports coding, mathematics, tool calling, and image understanding with a 262K-token context window. Ternary compression shrinks...