Both models report the same input price at $1 per 1M tokens.
API cost decision in 10 seconds
Claude Sonnet 5.5 (batch) vs Inkling
Pick Inkling for lower cost; pick Claude Sonnet 5.5 (batch) only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Inkling for lower cost; pick Claude Sonnet 5.5 (batch) only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Inkling is estimated at $3.02 vs $3.5 for Claude Sonnet 5.5 (batch), saving $0.48 (13.6% lower).
Cost-first pickInkling
Context-first pickClaude Sonnet 5.5 (batch)
Sample savings$0.4813.6%
10x traffic gap$4.75
Claude Sonnet 5.5 (batch) has more context, but Inkling saves $0.48 on the standard workload. At 10x that traffic, the same price gap is about $4.75. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Inkling stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Claude Sonnet 5.5 (batch) | Inkling |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Inkling | $7.5 | $7.03 |
| Balanced workload | 1M input + 1M output | Inkling | $6 | $5.05 |
| Output-heavy chatbot | 1M input + 5M output | Inkling | $26 | $21.25 |
Inkling is $0.95 cheaper per 1M output tokens (19% lower; 1.23x difference).
Claude Sonnet 5.5 (batch) has 475.71K more context (1.91x larger).
Inkling is $0.48 cheaper on the standard workload (13.6% lower).
Estimate your workload cost
Your Workload Cost
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
both models tie on input price; Inkling has the lower output price; Claude Sonnet 5.5 (batch) offers the larger context window. For the 1M input plus 500K output sample, Inkling is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $3.5 for Claude Sonnet 5.5 (batch) and $3.02 for Inkling.
Choose Claude Sonnet 5.5 (batch) when you care most about larger context window.
Choose Inkling when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, Inkling is estimated at $3.02 vs $3.5 for Claude Sonnet 5.5 (batch), saving $0.48 (13.6% lower).
- Inkling is $0.48 cheaper on the standard workload (13.6% lower).
- Both models report the same input price at $1 per 1M tokens.
- Inkling is $0.95 cheaper per 1M output tokens (19% lower; 1.23x difference).
- Claude Sonnet 5.5 (batch) has 475.71K more context (1.91x larger).
| Feature | Claude Sonnet 5.5 (batch) (Anthropic) | Inkling (Thinking Machines) |
|---|---|---|
| Input Price prompt tokens per 1M | $1 | $1 |
| Completion Price per 1M tokens | $5 | $4.05 |
| Sample Workload Cost 1M input + 500K output | $3.5 | $3.02 |
| Context Window | 1M | 524.29K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Inkling | On the standard 1M input plus 500K output workload, Inkling is estimated at $3.02 vs $3.5 for Claude Sonnet 5.5 (batch), saving $0.48 (13.6% lower). |
| High-volume input processing | Tie | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Inkling | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Claude Sonnet 5.5 (batch) | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Claude Haiku 5.5 (batch) can replace Claude Sonnet 5.5 (batch) when lower sample workload cost matters most: $0.17.
- Claude Haiku 5.5 can replace Claude Sonnet 5.5 (batch) when lower sample workload cost matters most: $0.35.
- Claude Haiku Latest can replace Claude Sonnet 5.5 (batch) when lower sample workload cost matters most: $0.35.
- Claude 3 Haiku can replace Claude Sonnet 5.5 (batch) when lower sample workload cost matters most: $0.88.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- Llama 4 Scout offers 1.31M context with $0.47 sample workload cost.
- MiMo-V2.6-Flash offers 1.05M context with $0.28 sample workload cost.
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Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
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Open provider hubsAnthropic catalog
Review all tracked Anthropic models before deciding whether this matchup is the right shortlist.
Open Anthropic modelsThinking Machines catalog
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Open Thinking Machines modelsClaude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Inkling is an open-weight multimodal mixture-of-experts model from Thinking Machines Lab, with 41B active parameters out of 975B total. It is designed for general-purpose reasoning, coding, agentic and tool-use systems,...