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arxiv: 2605.22195 · v1 · pith:FGPIMARWnew · submitted 2026-05-21 · 💻 cs.LG

Reinforced Graph of Thoughts: RL-Driven Adaptive Prompting for LLMs

Pith reviewed 2026-05-22 07:25 UTC · model grok-4.3

classification 💻 cs.LG
keywords graph of thoughtsreinforcement learningadaptive promptinglarge language modelsprompt engineeringautomated reasoningRL for LLMs
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The pith

Reinforcement learning can automatically generate task-specific graphs of operations for large language model prompting.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper proposes Reinforced Graph of Thoughts, which applies reinforcement learning to build graphs of operations adaptively from a fixed human-defined set instead of requiring manual construction for each problem. This targets the limitation that static graphs lack flexibility and demand expert insight into solution structures. A sympathetic reader would care because the method promises to make structured prompting more practical for problems whose complexity varies, reducing the need for repeated human design of the graph layout.

Core claim

Reinforced Graph of Thoughts (RGoT) is an automated approach to the Graph of Thoughts prompting paradigm that leverages reinforcement learning to adaptively generate a graph of operations from a human-defined set. Results indicate that, under certain constraints, it is possible to construct graphs of operations adaptively to the task's complexity in an automated way.

What carries the argument

Reinforced Graph of Thoughts (RGoT), an RL agent that selects and connects operations from the human-defined set to form a graph whose structure varies with the input task.

If this is right

  • Graphs of operations no longer require manual redesign for each new problem instance.
  • The generated graph structure can change automatically according to detected task complexity.
  • Elaborate LLM problem solving becomes feasible without in-depth knowledge of solution paths for every task.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The same RL selection process could be tested on other structured prompting formats such as trees or chains to check transferability.
  • Experiments that systematically vary the size and coverage of the operation set would clarify the boundary between workable and intractable constraint regimes.

Load-bearing premise

The human-defined set of operations must contain good solutions for the target tasks yet remain small enough for reinforcement learning to explore the space of possible graphs effectively.

What would settle it

On a high-complexity task solvable by a manually designed graph, measure whether the RL agent fails to discover any viable graph or produces solutions whose accuracy falls below that of the static baseline.

Figures

Figures reproduced from arXiv: 2605.22195 by Manuel Noah Riesen, Peter Alfred von Niederh\"ausern.

Figure 1
Figure 1. Figure 1: Prompting Paradigms with increasing complexity (from left to right). [PITH_FULL_IMAGE:figures/full_fig_p002_1.png] view at source ↗
Figure 2
Figure 2. Figure 2: Example GoO, GoT, and their relationship for the task [PITH_FULL_IMAGE:figures/full_fig_p005_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: Operation success probability Pˆ(c) as a function of complexity c for the operations of the tasks sum list and count keywords, evaluated with gpt-3.5-turbo-0125. 4.2 Reinforced Graph of Thoughts Agents We employ simple PPO agents with 2 layers of 64 units (for both actor and critic network) ( [PITH_FULL_IMAGE:figures/full_fig_p008_3.png] view at source ↗
Figure 4
Figure 4. Figure 4: Solved rate per complexity for all five tasks. RGoT agents (teal) are compared against the IO [PITH_FULL_IMAGE:figures/full_fig_p009_4.png] view at source ↗
Figure 5
Figure 5. Figure 5: Project Structure 13 [PITH_FULL_IMAGE:figures/full_fig_p013_5.png] view at source ↗
Figure 6
Figure 6. Figure 6: Pure Graph of Thoughts Types The related code can be found in the following repository: https://github.com/mriesen/ pure-graph-of-thoughts 14 [PITH_FULL_IMAGE:figures/full_fig_p014_6.png] view at source ↗
Figure 7
Figure 7. Figure 7: Operations of task sum list with input/output arities and prompt descriptions. Operation sum For a given list of single-digit integers, the sum is to be calculated (Listing 8). The scoring is based on whether the sum is correct. op_sum = PromptOperation ( name = ’ sum ’, n_outputs =1 , n_inputs =1 , type = OperationType . GENERATE , output_complexity = absolute_complexity (1) , prompt = Prompt ( instructio… view at source ↗
Figure 8
Figure 8. Figure 8: Definition of Operation sum Operation split A list is to be split into two equally sized sublists. The scoring is based on whether the output contains two similarly sized lists, with some lenience (sublist ratio ≥ 0.5). Operation merge Two given lists are to be merged into a single list. The result is scored based on whether the sum of the resulting list equals the sum of the input sublists and on the corr… view at source ↗
Figure 9
Figure 9. Figure 9: Operations of task sort list with input/output arities and prompt descriptions. Operation sort A given list is to be sorted in ascending order. The number of sort errors is calculated and the (binary) scoring strictly allows no errors. Operation split Identical to the Operation split of Task sum list. Operation merge Identical to the Operation merge of Task sum list. Operation branch 5 A programmatic opera… view at source ↗
Figure 10
Figure 10. Figure 10: Operations of task intersect set with input/output arities and prompt descriptions. Operation intersect The intersection of a set is to be created. The scoring is based on whether the intersection of the sets is correct. Operation split set Given two sets as input (a single state), two states are created: The first set is split in half, the subsets are fed as first set into the respective output states, i… view at source ↗
Figure 11
Figure 11. Figure 11: Operations of task count keywords with input/output arities and prompt descriptions. Operation count Given a text, the number of specific words (here: countries) is to be counted. The scoring is based on whether the words are counted correctly. Operation split Given a text, it is to be split into two substrings of similar size. Here, the scoring is dependent on whether the text is split correctly and in t… view at source ↗
Figure 12
Figure 12. Figure 12: Operations of task merge docs with input/output arities and prompt descriptions. Operation merge Several documents are to be merged into a single one, while minimizing redundancy and maximizing information retention. The scoring is based on the ROUGE-L (retention) and ROUGE-1 (redundancy) score and the resulting F1 score Lin (2004). To decide whether a result is valid, we used the threshold 0.6, which was… view at source ↗
Figure 13
Figure 13. Figure 13: Operation success probability Pˆ(c) as a function of complexity c for each task, evaluated with gpt-3.5-turbo-0125. G.1 Initial LLM Evaluation The operation sum of the task sum list was initially evaluated on different language models. The variants of gpt-3.5-turbo are quite on-par in solving the specified task. The model gpt-4-turbo-2024-04-09 maintains a higher success rate before degrading similarly ( … view at source ↗
Figure 14
Figure 14. Figure 14: LLM Evaluation Results for Operation sum of Task sum list (with n = 100) 23 [PITH_FULL_IMAGE:figures/full_fig_p023_14.png] view at source ↗
Figure 15
Figure 15. Figure 15: LLM Evaluation Results for Operation sum of Task sum list (with n = 100) 24 [PITH_FULL_IMAGE:figures/full_fig_p024_15.png] view at source ↗
Figure 16
Figure 16. Figure 16: Number of operations per complexity for all five tasks. The vertical line marks the training front, [PITH_FULL_IMAGE:figures/full_fig_p025_16.png] view at source ↗
read the original abstract

Graph of Thoughts (GoT), a generalized form of recent prompting paradigms for large language models (LLMs), has been shown to be useful for elaborate problem solving. By executing a graph of operations, thoughts of the LLM are structured as an arbitrary graph, forming the actual graph of thoughts. Originally, the graph of operations is defined manually, which requires in-depth knowledge about the solution of the problem to solve. Such a static graph of operations is rigid and therefore lacks adaptability. We propose Reinforced Graph of Thoughts (RGoT), an automated approach to the GoT prompting paradigm that leverages reinforcement learning (RL) to adaptively generate a graph of operations from a human-defined set. Results indicate that, under certain constraints, it is possible to construct graphs of operations adaptively to the task's complexity in an automated way.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The manuscript introduces Reinforced Graph of Thoughts (RGoT), which applies reinforcement learning to automatically construct adaptive graphs of operations for LLM prompting, starting from a human-defined set of operations. It claims that under certain constraints this yields graphs tailored to task complexity, overcoming the rigidity of manually specified static graphs in the Graph of Thoughts paradigm.

Significance. If the empirical demonstration holds with proper validation and baselines, the integration of RL for dynamic operation-graph construction could meaningfully reduce the expert knowledge required for effective LLM reasoning on complex tasks and extend structured prompting techniques. The approach directly addresses adaptability limitations in prior GoT work.

major comments (2)
  1. [Abstract] Abstract: The statement 'Results indicate that, under certain constraints, it is possible to construct graphs of operations adaptively to the task's complexity in an automated way' supplies no quantitative metrics, error bars, baseline comparisons (e.g., to static GoT or other RL-free methods), or description of the RL setup (policy, reward, state representation). This leaves the central empirical claim without visible support.
  2. [Method] The human-defined operation set is asserted to enable effective RL exploration, yet no characterization of its cardinality, diversity, or task coverage appears; without this, it is impossible to verify that the set is simultaneously rich enough to contain high-quality solutions and compact enough to avoid prohibitive sample complexity, which is load-bearing for the 'certain constraints' qualifier.
minor comments (2)
  1. [Method] Clarify the precise RL algorithm (e.g., PPO, REINFORCE) and how the graph-construction action space is represented to avoid ambiguity in reproducibility.
  2. [Experiments] Add a table summarizing the evaluated tasks, operation-set sizes, and key performance deltas versus baselines.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for the constructive feedback on our manuscript. We address each major comment point by point below, indicating where revisions will be incorporated to strengthen the presentation of our results and method.

read point-by-point responses
  1. Referee: [Abstract] Abstract: The statement 'Results indicate that, under certain constraints, it is possible to construct graphs of operations adaptively to the task's complexity in an automated way' supplies no quantitative metrics, error bars, baseline comparisons (e.g., to static GoT or other RL-free methods), or description of the RL setup (policy, reward, state representation). This leaves the central empirical claim without visible support.

    Authors: We agree that the abstract is currently high-level and does not include quantitative metrics, error bars, or explicit details on the RL setup. The full manuscript reports experimental results with baseline comparisons (including static GoT) and describes the RL components (policy gradient optimization with a reward based on task accuracy and graph efficiency) in the Experiments and Method sections. To better support the central claim, we will revise the abstract to include a concise reference to key performance gains and the RL formulation while maintaining length limits. revision: yes

  2. Referee: [Method] The human-defined operation set is asserted to enable effective RL exploration, yet no characterization of its cardinality, diversity, or task coverage appears; without this, it is impossible to verify that the set is simultaneously rich enough to contain high-quality solutions and compact enough to avoid prohibitive sample complexity, which is load-bearing for the 'certain constraints' qualifier.

    Authors: The referee correctly notes that the manuscript does not characterize the human-defined operation set in terms of cardinality, diversity, or task coverage. We will add this information in the revised Method section, including the number of operations, their coverage of reasoning primitives, and how the set size balances expressiveness against sample complexity to support the 'certain constraints' under which adaptive graph construction is feasible. revision: yes

Circularity Check

0 steps flagged

No circularity: empirical RL method proposal with no derivations or self-referential reductions

full rationale

The paper introduces RGoT as an RL-based automation of the GoT prompting paradigm, where a human-defined operation set is an explicit external input and the central claim is an empirical observation that adaptive graph construction is possible under certain constraints. No equations, derivations, fitted parameters renamed as predictions, or load-bearing self-citations appear in the abstract or described content. The method is presented as a practical extension relying on standard RL exploration rather than any closed-form reduction to its own inputs, rendering the derivation chain self-contained.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

The approach assumes a human-provided operation set is both sufficient and tractable for RL search; no free parameters, axioms, or invented entities are described in the abstract.

pith-pipeline@v0.9.0 · 5670 in / 1052 out tokens · 34509 ms · 2026-05-22T07:25:23.272466+00:00 · methodology

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