LangChain: new Tuned Evaluators usage pricing (0.01 LCU/eval run)
What happened
Between the Aug 17, 2026 and Aug 24, 2026 captures of LangChain's pricing page, Pulse recorded one change: Introduced Tuned Evaluators, a pay-as-you-go evaluation feature priced at 0.01 LCU per Evaluation Run (Perceived Error), in public beta for Plus and Cloud Enterprise plans. In detail: Introduced Tuned Evaluators, a new pay-as-you-go evaluation feature priced at 0.01 LCU per Evaluation Run (Perceived Error), in public beta for Plus and Cloud Enterprise plans. Pulse files it as a product change (feature added) with an upward direction. Pulse's latest capture (Oct 5, 2026) lists Plus at $39.
It lands 20 days after LangChain's previous change, "LangChain: VC-backed startup discount now discloses $10K credit amount" (Aug 3, 2026). Before that Pulse recorded "LangChain: Startup discount program now discloses $10,000 credit amount" (Jul 28, 2026), "LangChain adds Support Portal + Slack support channels" (Jul 27, 2026) and "LangChain overhauls LangSmith billing: new LSU, size-based Serverless/Dedicat" (Jul 21, 2026). LangChain has been tracked since 2024-11-17.
In the same window Together AI, OpenAI, Anthropic, Huggingface and Cohere also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- Plus, Enterprise · FeatureAddedNo Tuned EvaluatorsTuned Evaluators
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| Plus, Enterprise | Feature | No Tuned Evaluators | Tuned Evaluators | Added |
Values as written on LangChain's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of LangChain's pricing page (langchain.com) from Aug 17, 2026 and Aug 24, 2026; the change is marked around the middle of the page, where Tuned Evaluators now appears.
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LangChain, the last 90 days
Full history- Oct 5, 2026packagingLangChain retires LCU billing, moves all usage to $1 Standard Units
- Oct 2, 2026packagingLangChain merges LangSmith LCU and LSU into one $1.00 Standard Unit
- Aug 24, 2026improvedLangChain: new Tuned Evaluators usage pricing (0.01 LCU/eval run) · this change
- Aug 3, 2026packagingLangChain: VC-backed startup discount now discloses $10K credit amount
- Jul 28, 2026packagingLangChain: Startup discount program now discloses $10,000 credit amount
- Jul 27, 2026improvedLangChain adds Support Portal + Slack support channels
- Jul 21, 2026packagingLangChain overhauls LangSmith billing: new LSU, size-based Serverless/Dedicat...
- Jun 16, 2026improvedLangChain unlocks unlimited Fleet agents for free Developer plan
- Jun 1, 2026packagingLangChain launches metered billing at $1.50 per compute unit
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- Together AIAug 17Together AI unveils Qwen3.8-2.4T-A95B, Muse Glimmer, DeepSeek V4 Pro pricing on ...
- OpenAIJul 25OpenAI: ChatGPT plan taglines reframed to 'Best for X' audience framing
- AnthropicJul 23Anthropic: Fable model + context window disclosed in comparison table
- HuggingfaceJul 3Enterprise SCIM provisioning & Team SSO OIDC added + 2 more changes
- CohereJul 2Cohere: New Rerank 4 Pro Large tier in Model Vault ($10/hr, $6,500/mo)
Questions about this change
Did LangChain raise prices in August 2026?
No list-price increase was recorded between Aug 17, 2026 and Aug 24, 2026. The change Pulse detected was a product change: feature added.
What changed on LangChain's pricing page between Aug 17, 2026 and Aug 24, 2026?
Plus, Enterprise feature: No Tuned Evaluators → Tuned Evaluators, added. Pulse compared the captures it took on Aug 17, 2026 and Aug 24, 2026; the before/after table above lists each item as written on the page.
How often does LangChain change its pricing?
Pulse recorded 6 other pricing-page changes for LangChain in the 90 days before this one; the previous change was "LangChain: VC-backed startup discount now discloses $10K credit amount" on Aug 3, 2026; LangChain has been tracked since 2024-11-17.