Which Claude tier should I use in June 2026?

Match the tier to the workload. Haiku 4.5 ($1/$5 per MTok) is the price-leader for classification, simple extraction, RAG over short docs, and high-volume API workflows. Sonnet 4.7 ($3/$15) is the workhorse for code edits, document analysis, multi-turn agent steps, and most production agent subroutines. Fable 5 ($10/$50) is for hard agentic coding, research-grade reasoning, and long-context tasks where the 9-point SWE-Bench Pro lead over Opus 4.8 is worth 2x the cost. The orchestrator pattern — Sonnet 4.7 or Opus 4.8 directing many Haiku 4.5 subagents — beats running Fable 5 monolithically for most production agent workloads.

What's the difference between Sonnet 4.7 and Opus 4.8?

Sonnet 4.7 ($3 input / $15 output per MTok) is the production workhorse — fast, cheap, and tuned for coding and tool use. Opus 4.8 ($5/$25) trades latency and cost for deeper reasoning. On SWE-Bench Pro, Opus 4.8 leads Sonnet 4.7 by roughly 4 points. For most production code edits, refactors, and agent steps, Sonnet 4.7 is the right default. Use Opus 4.8 when reasoning depth genuinely matters — hard debugging, architecture design, multi-step planning. Use Fable 5 only when Opus 4.8 isn't enough.

Does Haiku 4.5 work for agentic coding?

Yes, but in a specific pattern. Haiku 4.5 ($1/$5 per MTok) is excellent as a subagent in an orchestrator setup: an Opus 4.8 or Sonnet 4.7 orchestrator plans the task, then fans out to N Haiku 4.5 subagents that each do a focused job (read a file, run a test, summarize a function). For standalone agentic coding — picking up a complex multi-file ticket and shipping a working patch — Haiku 4.5 is not strong enough. SWE-Bench Pro gap to Sonnet 4.7 is too wide. Use Haiku 4.5 in the subagent role, Sonnet 4.7 in the worker role, and Opus 4.8 / Fable 5 in the orchestrator role.

Should I just always use Fable 5?

No. Fable 5 costs 10x Haiku 4.5 and 3.3x Sonnet 4.7. For high-volume workflows — classification, RAG, batch summarization, structured extraction — Fable 5 burns budget without changing outputs meaningfully. For interactive chat UX, Fable 5's deeper reasoning adds latency. The only workloads where Fable 5 reliably pays for itself are: long-horizon agentic coding (>15 min autonomous runs), research-grade reasoning, and tasks that need >500k token context. See [Claude Fable 5 vs Opus 4.8 should you upgrade](/answers/claude-fable-5-vs-opus-4-8-should-you-upgrade-june-2026/) for the detailed economic breakdown.

Quick Answer

Claude Fable 5 vs Sonnet 4.7 vs Haiku 4.5: Which Tier in June 2026?

Published: June 11, 2026

Claude Fable 5 vs Sonnet 4.7 vs Haiku 4.5: Which Tier?

Anthropic now offers four production Claude tiers in June 2026. Picking the right one is the single biggest cost-and-quality lever in your stack. Here is the honest matchup.

Last verified: June 11, 2026

TL;DR

Tier	Input / Output ($/MTok)	Best for	Avoid for
Haiku 4.5	$1 / $5	RAG, classification, subagents, high-volume	Hard agentic coding alone
Sonnet 4.7	$3 / $15	Code edits, doc analysis, production agents	PhD-grade reasoning
Opus 4.8	$5 / $25	Hard debugging, orchestrators, planning	High-volume API workflows
Fable 5	$10 / $50	Long-horizon agentic coding, research math, 1M context	Anything you’d pay 2x for without 2x value

Head-to-head

Property	Haiku 4.5	Sonnet 4.7	Opus 4.8	Fable 5
Release	2025	March 2026	March 2026	June 9, 2026
Context window	200k	500k	500k	1M
Max output	32k	64k	128k	128k
Input price	$1	$3	$5	$10
Output price	$5	$15	$25	$50
Batch input	$0.50	$1.50	$2.50	$5
Batch output	$2.50	$7.50	$12.50	$25
SWE-Bench Pro	~52%	~67%	71.4%	80.3%
Terminal-Bench 2.1	~62%	~72%	76.2%	84.1%
MCP Atlas	~74%	~80%	83.6%	88.7%
GPQA Diamond	~66%	~76%	81.0%	87.8%
Latency	Fastest	Fast	Moderate	Slowest
Cybersecurity refusals	Standard	Standard	Standard	Stricter

Pick by use case

Classification, extraction, simple RAG

→ Haiku 4.5. At $1/$5 per MTok and sub-second latency, nothing else makes economic sense. Sonnet 4.7 is 3x the cost for marginal quality gains on these tasks.

Single-shot code edits, refactors, simple agent steps

→ Sonnet 4.7. The workhorse. Most production code-completion and agent workloads run here. Fable 5 is 3.3x the price for ~13 points of SWE-Bench Pro improvement that rarely matters for routine edits.

Long-running autonomous coding agent

→ Fable 5 for the orchestrator + Sonnet 4.7 or Haiku 4.5 for subagents. Fable 5 leads Opus 4.8 by 9 points on SWE-Bench Pro and 8 points on Terminal-Bench — meaningful for runs longer than 15 minutes.

Orchestrator + 100s of subagents pattern

→ Opus 4.8 orchestrator + Haiku 4.5 subagents. The economic sweet spot per Dynamic Workflows. Total cost: typically $0.30 per 100-step task vs $4.50 for a monolithic Fable 5 run.

Hard scientific or math reasoning

→ Fable 5. GPQA Diamond at 87.8% and AIME 2025 at 96.2% are genuinely PhD-grade. Opus 4.8 is the next best at 81% / 91.3%.

Long context (>500k tokens)

→ Fable 5 (1M context) or Gemini 3.5 Pro (2M context). Sonnet 4.7 and Opus 4.8 cap at 500k.

Interactive chat UX

→ Sonnet 4.7. Best latency-quality balance. Fable 5’s deeper reasoning adds wall-clock time per response.

Cost-sensitive high-volume API

→ Haiku 4.5. At $1/$5, you can call it tens of thousands of times per day and stay under most reasonable budgets.

Cost example: 100-step coding agent

Setup	Per step	100 steps
Fable 5 monolithic	$4.50	$450
Opus 4.8 monolithic	$2.25	$225
Sonnet 4.7 monolithic	$1.35	$135
Opus 4.8 + Haiku 4.5 subagents	~$0.30	$30
Sonnet 4.7 + Haiku 4.5 subagents	~$0.18	$18

The orchestrator-subagent pattern is 15–25x cheaper than running Fable 5 monolithically and often produces similar results because each subagent operates with a focused context window.

When to climb the tier ladder

Start at Haiku 4.5.

Is output quality acceptable?
├── Yes → Stay on Haiku 4.5
└── No → Upgrade to Sonnet 4.7

Is output quality acceptable?
├── Yes → Stay on Sonnet 4.7
└── No → Consider orchestrator + subagent pattern first
        ├── Pattern works? → Use Opus 4.8 + Haiku 4.5
        └── Still not enough → Upgrade to Fable 5

Pro/Max Claude.ai user advice

The June 22, 2026 usage-credits change makes Fable 5 consume credits roughly 2x faster than Opus 4.8 from your Pro quota. For heavy claude.ai users:

Workload	Recommended tier on Pro/Max
Chat / writing	Sonnet 4.7
Daily coding	Opus 4.8 default, Fable 5 for hard tasks
Research / analysis	Fable 5 when needed, Opus 4.8 otherwise

Migration tips

From → To	Watch for
Haiku 4.5 → Sonnet 4.7	Re-baseline cost dashboards — 3x increase
Sonnet 4.7 → Opus 4.8	Latency increases noticeably
Opus 4.8 → Fable 5	Cost doubles, cybersecurity refusals stricter
Anywhere → Orchestrator pattern	Re-architect agent loop; expect 5–25x cost reduction

What’s next

Anthropic typically ships a new Opus tier 2–3 months after the prior one. Expect Opus 4.9 or 5.0 in Q3 2026 — likely benchmarking near today’s Fable 5 at half the price. If you’re not in a rush on the Fable 5 upgrade, waiting 60–90 days may compress the upgrade math significantly.

Sources

Anthropic Newsroom: Claude Fable 5 and Claude Mythos 5 (June 9, 2026)
llm-stats.com: Claude model pricing and benchmarks (June 2026)
Vellum AI: Claude Fable 5 & Mythos 5 Full Benchmark Breakdown (June 2026)
Finout: Claude Fable 5 and Mythos 5 Pricing and API Costs (June 2026)
TrueFoundry: Claude Fable 5 API Benchmarks Pricing (June 2026)