Claude Sonnet 4.6
AnthropicLong-context · tool use · production default
AI development services and AI development company work for teams shipping real production AI. Generative AI, ML, LLM agents, AI app development, RAG, and vision pipelines — model-agnostic across Claude and GPT, eval-tested, token-optimized. Operator team that uses Claude Code + OpenAI Codex daily. First workflow live in 30 days.
Generative AI development services, AI app development services, machine learning development services, LLM agents, custom AI development, AI product development — covered by one operator team rather than six specialist vendors. Every pattern ships with an eval suite, audit logging, and a token-cost target.
Production GenAI applications — copilots, drafting tools, summarizers, classifiers, and structured-extraction pipelines. Claude or GPT picked per workload, eval set rebuilt against your real corpus, monitoring + retry policy shipped with it.
End-to-end AI app development — Flutter and web frontends, FastAPI or Node backends, vector retrieval, auth, billing, telemetry. Operator team that uses Claude Code + OpenAI Codex daily ships your AI app — not a slide deck.
Where the LLM isn't the right answer: forecasting, recommendation, anomaly detection, computer vision on edge. We rebuild the eval set, benchmark a baseline (XGBoost, scikit, PyTorch) against an LLM call, and ship whichever wins on your data.
Function-calling agents over your real systems — Salesforce, Slack, NetSuite, your repo. LangGraph or hand-rolled, whichever is simpler. Sub-second voice agents on the OpenAI Realtime API for call deflection.
When off-the-shelf SaaS doesn't fit. RAG over your private corpus (Notion / Drive / Confluence / pgvector / Pinecone), vision pipelines for invoices and claims, multi-vendor routing where compliance demands it. Built around your data model, not ours.
Zero-to-one AI product builds — concept validation, eval-first prototyping, design + engineering, and the 8-week production sprint. We co-build with founders who have a thesis and need an operator team, not a consulting deck.
Most AI engineering companies show a logo cloud. We show the layers: frontend, agents, data, infra, eval. Each opens to the tools we name, the production failure modes we've actually hit, and our default unless there's a reason not to. AI native software development isn't a label — it's whether the eval set exists.
Next.js or Astro for marketing surfaces and dashboards, Flutter where a single codebase needs to ship mobile + web. Streaming via SSE unless WebSocket is needed for bidirectional audio.
Hand-rolled Python tool loops for anything under ~6 steps; LangGraph when the graph branches. We pick Claude Sonnet for long-context tool runs, Haiku or GPT-5.4-mini for high-volume narrow tasks. Routing is a deliberate per-call decision, not a default.
pgvector on your existing Postgres for ≤2M chunks (operationally simpler, no extra vendor); Pinecone or Weaviate past that. Hybrid BM25 + dense retrieval + Cohere Rerank by default — the quality lift is bigger than picking a fancier embedding model.
Anthropic + OpenAI direct for fastest model access; Azure OpenAI or AWS Bedrock when compliance posture (HIPAA BAA, SOC 2, FedRAMP) requires it. Multi-vendor failover wired in for any workload above $5K/mo run cost — single vendor is a liability we won't sign off on.
Eval suite is the first thing we build, before any agent code. Langfuse for prompt + trace observability, Braintrust or a hand-rolled pytest harness for the golden set, shadow-mode mirroring before every cutover. If there's no eval, there's no ship — even from us.
Defaults reflect our current operator playbook (2026). Picked per workflow, not per partner badge — the rationale is in the per-layer detail.
Custom AI development isn't one product; it's three engagement shapes that serve different stages. Most clients arrive at the middle (pilot), some need strategy first, some need ongoing capacity. Same operator team, different cadence. The fit-test is the audit — the strategy-first path lives on our AI consulting page.
Engagement distribution from shipped client work — your path may differ. The kill point on the pilot is non-negotiable; we'd rather lose phase 2 than ship a workflow that won't move the metric.
The "top AI development companies" listicles measure the wrong things — team size, year founded, awards. Buyers should grade on the operating practice. Here's the rubric we'd score ourselves on if we were on the other side of the discovery call.
tap pass / fail on each criterion · saved locally in your browser
Builds the eval suite before any agent code. Shows you the golden set and the regression test before shipping a feature.
"We'll add evals once it's working." Eval set is the engineer's three hand-curated prompts in a Notion doc.
Picks per workflow with the data. Will tell you why GPT-5.4-mini won the classifier and Sonnet 4.6 won the long-context summarizer.
Defaults to whichever model the founder posted about most recently on X. Single-vendor stack with no failover.
Projects per-workflow token cost before the contract. Has a written playbook for routing, caching, and batch APIs.
Quotes a project price but won't tell you what the model bill will look like at steady state. "That depends."
Names the specific tools their engineers use daily (Claude Code, OpenAI Codex, LangSmith, Langfuse). Has a take on each.
Says "we use industry-leading tooling." Slides full of partner logos without a single named SDK or framework.
Will say "don't use us for this" or "that workload is wrong for an LLM." Recommends a non-AI baseline first.
Every workflow is a perfect fit. Every meeting ends with "we can definitely do that." Nothing is out of scope.
Shows actual production traces, anonymized capability patterns with metrics, a real repo or PR you can read.
Case-study page is stock-logo grids. "Trusted by" companies that turn out to be ex-employee LinkedIn networks.
Will deploy on Azure OpenAI / AWS Bedrock with BAA, PrivateLink, KMS. Has a DPIA template. Knows the SOC 2 questionnaire.
"Yes we're SOC 2." Can't produce the report or name the auditor. PII handling pattern is "we'll figure it out."
Fixed-fee audit, fixed-price pilot, monthly continuous — published prices, no hidden tiers. Kill point on every pilot.
Custom-quote-only. Pricing pages that say "contact us." Pilot bills that mysteriously double in week 6.
Ships Claude and GPT in the same codebase. Has a routing layer. Treats vendor lock-in as a risk to be engineered around.
Single-vendor partner badge on the homepage. Will tell you whichever model you ask about is "obviously the best."
Engineers with public repos, talks, or articles. Open-source contributions you can verify on GitHub.
Generic team page with stock photos. The engineers you'd actually work with are never on the discovery call.
Copy this rubric into your next AI vendor discovery call. If the answer to any criterion pivots to a slide rather than a specific tool name, that's the data point.
LLM development company work that ships only one vendor is rarely about the model — it's about a partner badge. We pick across Claude, GPT, open-weights, and Gemini per workload on the eval data. The four cards on the right are how we frame the trade-off before we look at numbers.
Four tactics stacked. Each one independently saves money; together they typically bring effective token cost to 8–15% of the naive baseline — at the same eval-suite quality. The playbook is identical whether you're on Claude, GPT, or a multi-vendor router.
The shape is the same every time: eval set first, kill point written into the SOW, shadow-mode before cutover, token-optimization pass after. Most pilots ship in 5–8 weeks; the audit upfront is the part that prevents week-6 surprises.
We rebuild the eval suite against your real data, audit the candidate workflows, project per-workflow token cost, and pick the model per workload. You see the data, not our opinion.
We pick the highest-ROI workflow, draft the architecture, agree the success metric, and write down the kill point in the SOW. If the eval doesn't move during the build, we stop — no phase 2.
We build the workflow end-to-end against your real systems, deploy behind a feature flag, run shadow mode against your current pipeline (or manual baseline). You see quality + cost on real traffic before cutover.
Cutover behind the flag. We run the token-optimization pass — routing, caching, Batch API. Monthly cost-of-ownership and drift report from month 2 onward. Most workflows hit 30–60% cost reduction post-cutover.
Three anonymized capability patterns drawn from real engagements. Named references shared under NDA once we know what you're building.
Support team drowning in a long tail of "how do I configure X" tickets; tier-1 reps spending most of their time on a small set of repeating questions.
RAG agent over the product docs + past tickets, Claude Sonnet 4.6 for the synthesis step, Haiku 4.5 for the cheap classification step. Zendesk integration with draft-mode replies (human reviews before send).
Claims adjusters manually extracting fields from scanned forms + accident-scene photos; high error rate on multi-document submissions; backlog growing.
GPT-5.4 vision pipeline on Azure OpenAI (PrivateLink, BAA) reads photos + forms and returns structured JSON with confidence per field. Sub-threshold confidence routes to an adjuster with the AI's interpretation attached for review.
Marketplace listing fraud — fake listings, image-stolen products, copy-pasted descriptions. Pure-ML classifier hit a precision ceiling; pure-LLM was too expensive at listing-creation throughput.
Hybrid: XGBoost classifier on structured signals (account age, image hash, price delta) decides the easy cases; Claude Haiku 4.5 reviews the gray-band 8%. Disagreement routes to human moderation.
Same pricing as our other engagements — consistent across our Claude, OpenAI, and integration pillars. Most clients begin with the audit to scope, run a 5–8 week pilot on the highest-ROI workflow, then move to monthly for the next 3–5.
Find the AI workflows worth shipping before you commit a budget.
One AI workflow shipped end-to-end with eval data — not a demo.
Embedded squad shipping the next AI workflow on your roadmap.
Most credible AI software development companies do four things: scope which AI workflows are worth building (audit), build them against your real systems (pilot), run them in production with monitoring + drift detection (continuous), and tell you when AI is the wrong answer (where forecasting, rule-based systems, or a SaaS tool will outperform an LLM call). We do all four. The shape of a good AI development engagement is rarely "build me a chatbot" — it's rebuild the eval set, pick the right model per workload, ship one workflow end-to-end with a kill point, and report on cost-of-ownership monthly afterward.
Read the vendor rubric above — the 10 criteria are the ones we'd grade ourselves on. The short version: a credible AI development company builds the eval suite first, picks models per workflow rather than per partner badge, will project token cost at steady state before you sign, and will tell you when an LLM is the wrong answer. Top AI development companies show you anonymized capability patterns with real metrics, not stock-logo client grids. They publish pricing. They name the engineers you'll actually work with. They have public open-source work you can verify on GitHub. If a vendor can't answer "what's your eval methodology?" without pivoting to a slide, that's the answer.
AI consulting is strategy: we audit your existing workload (or evaluate a future one), recommend which model fits each use case, project token costs, and give you a 90-day implementation roadmap. We deliver a document, not code. <a href="/services/ai-consulting/">AI consulting and development</a> together is the most common path — most teams start with a one-week audit ($3K) to scope what's worth building, then move into a development pilot ($10–25K) for the highest-ROI workflow. Some teams already know what they want shipped and skip the audit. Both paths are fine — the audit is a fit-test, not a gate.
Both. Generative AI development services is the umbrella: production GenAI applications (copilots, drafting tools, summarizers), structured-extraction pipelines on images and documents, LLM agents that take actions against real systems, voice agents on the OpenAI Realtime API, and RAG over your private corpus. LLM development services specifically is the deeper engineering of the agent layer — tool-use schemas, multi-step orchestration, prompt caching, eval suites, and drift monitoring. We treat them as one engagement; you don't have to pick.
Yes. AI app development services is one of our most-shipped patterns. We build your AI app end-to-end — frontend (Next.js, Astro, or Flutter when a single codebase needs to ship mobile + web), backend (FastAPI or Node), retrieval (pgvector or Pinecone), agent layer (Claude or GPT), auth/billing, and telemetry. The AI part is one variable in a normal app build; we don't treat it as a separate workstream that needs its own vendor. An AI app development company that can't ship the actual app is selling consulting under a different name.
Some workloads aren't a fit for an LLM call — they need classical machine learning. Forecasting (sales, demand, inventory), recommendation systems, anomaly detection, computer vision on edge devices, and high-volume narrow classification all typically belong in XGBoost, scikit-learn, or PyTorch territory rather than "prompt a model." Machine learning development services is where we build those. We often ship hybrid systems: ML for the structured-signal majority, an LLM for the gray-band cases the classifier isn't confident on (see the marketplace fraud capability pattern above). The point is to use the cheaper tool when it works and only escalate to an LLM when the cheaper tool can't.
Three engagement tiers, no surprises. A one-week audit is $3,000 — workflow inventory, model recommendation per workflow, token-cost projection, stack recommendation, 90-day roadmap. A pilot is $10,000–$25,000 fixed price, 5–8 weeks — one AI workflow shipped end-to-end with eval, monitoring, and runbook. A continuous AI team is from $5,000 per month — embedded PM + AI engineers shipping integrations on your roadmap with monthly cost-of-ownership reporting. Per-workflow run cost at steady state typically lands at $200–$1,500/month depending on volume and which model tier the workflow uses. If you need to hire AI developers as a standalone capacity (no scope, just heads), we're not the best fit — we're an outcome-priced operator team, not a staffing shop.
Three honest cases. (1) The workflow doesn't need an LLM — rule engines, structured ETL, or a SaaS tool will outperform an AI call at a fraction of the run cost. We'll tell you in the audit if that's you. (2) You don't have the data yet — if the eval set can't be built because the underlying business process isn't measured, the AI build is premature. Fix the measurement first. (3) You need an in-house AI org built. A vendor (us included) is the wrong shape; you need a head of AI engineering and a hiring plan, and we'd recommend an executive search firm. The honest answer to "should we hire an AI development company?" is "sometimes." We're glad to be one of those times — but not when we're not.
One week, fixed-fee. We rebuild your eval set against your real data, rank the candidate AI workflows by ROI, project token cost at steady state, recommend the model + stack per workflow, and hand you a 90-day implementation roadmap. No deck, no obligation to build with us afterward.
AI development almost always overlaps with model-specific work, integration, or strategy. These pillars go deeper on each.
Anthropic Claude integration, Sonnet 4.6 + Haiku 4.5 agents, the sibling model pillar.
Read more 02GPT-5.4, Realtime API voice agents, OpenAI Codex — the other half of our model stack.
Read more 03Plug Claude or GPT into Salesforce, Slack, NetSuite, and your existing systems.
Read more 04Production workflow automation in 6–8 weeks — agents doing the work, not assisting it.
Read more 05Strategy and roadmap engagement before the build — fit-test, not a gate.
Read more 06Multi-step autonomous agents with LangGraph and model-agnostic tool use.
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