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The Cheapest Way to Use the Claude API in 2026

Three providers of the same Claude models, priced side by side. The provider moves the bill by about 16 percent. Model choice and output length move it far more.

Updated 9 Oct 2026 · 7 min read · First published 5 Oct 2026

Summary

  • SayGM prices Claude about 11 percent below Anthropic list and about 16 percent below OpenRouter.
  • OpenRouter is the most expensive provider: list price plus a 5.5 percent top-up fee.
  • Haiku 4.5 costs half of Sonnet 5, which costs two fifths of Opus 5.
  • Output tokens are 56 percent of a Claude bill at an 80/20 mix.
  • Prompt caching only pays while a conversation stays on one provider.

01

Three providers of Claude

ProviderPriceAPIFallback
Anthropic directListNative AnthropicNone across providers
OpenRouterList plus 5.5% feeOpenAI-compatibleRetry on next provider
SayGMAt or below listNative AnthropicCascade models

Only one of the three costs less than going direct. The other trade-offs are API shape and what happens when a provider fails.

02

Prices side by side

USD per million tokens, input / output.
ModelAnthropic listOpenRouterSayGM
Claude Opus 5$5.00 / $25.00$5.28 / $26.38$4.45 / $22.23
Claude Sonnet 5$2.00 / $10.00$2.11 / $10.55$1.78 / $8.89
Claude Haiku 4.5$1.00 / $5.00$1.06 / $5.28$0.89 / $4.45
Fig. 1Monthly Claude bill by provider, 50M input and 15M output tokens
  • Provider direct, list price
  • OpenRouter, fee included
  • SayGM
Claude Fable 5.1
$1,250
$1,319
$1,111
Claude Opus 5.5
$500
$528
$445
Claude Sonnet 5.5
$250
$264
$222
Claude Opus 5
$625
$660
$556
Claude Sonnet 5
$250
$264
$222
Claude Haiku 4.5
$125
$132
$111
Show data as a table
Provider direct, list priceOpenRouter, fee includedSayGM
Claude Fable 5.1$1,250$1,319$1,111
Claude Opus 5.5$500$528$445
Claude Sonnet 5.5$250$264$222
Claude Opus 5$625$660$556
Claude Sonnet 5$250$264$222
Claude Haiku 4.5$125$132$111
Provider direct is Anthropic list price. OpenRouter passes list price through and adds its top-up fee. Prompt caching discounts are excluded on every route. Source: published rate cards, October 2026 snapshot. Current prices on saygm.com (opens in a new tab).

For Sonnet 5 at 50M input and 15M output tokens a month: $250 direct, $264 on OpenRouter, $222 on SayGM. The ordering is the same for every Claude model.

03

Model choice matters more than provider

On the same workload, moving from Opus 5 to Sonnet 5 saves $334 a month on SayGM. Moving Sonnet 5 from OpenRouter to SayGM saves $41. Pick the model first, then the route.

50M input and 15M output tokens a month on SayGM.
ModelMonthly costBest for
Claude Opus 5$556Agentic coding, long multi-step tasks
Claude Sonnet 5$222Daily coding in editors and agents
Claude Haiku 4.5$111Classification, extraction, pipelines

See Opus 5 vs Sonnet 5 for the full breakdown.

04

Output is most of the bill

Every Claude model prices output at five times input. At an 80/20 mix that makes output 56 percent of the cost. One saved output token is worth five saved input tokens.

Fig. 2Share of the bill from output tokens at an 80/20 token mix
  • Input tokens (80% of volume)
  • Output tokens (20% of volume)
Claude Opus 5
Claude Sonnet 5
Claude Haiku 4.5
Show data as a table
ModelShare of bill from inputShare of bill from output
Claude Opus 544%56%
Claude Sonnet 544%56%
Claude Haiku 4.544%56%
Output tokens are a fifth of the volume but most of the cost on every frontier model. Trimming output length saves more than trimming prompts. Source: published rate cards, October 2026 snapshot. Current prices on saygm.com (opens in a new tab).

05

Keep prompt caching working

Caching is where Claude costs are won or lost on long system prompts and agent loops. A cached prefix only hits if the next request reaches the same provider. SayGM keeps a conversation on one provider. Gateways that spread a conversation across providers silently lose the discount.

06

Route easy work to Haiku

Send simple requests to Haiku 4.5 and escalate to Sonnet 5 on failure. If escalated requests pay for both attempts, the cascade saves money while fewer than half of requests escalate. At 30 percent escalation the Sonnet workload above drops from $222 to $178 on SayGM.

SayGM's cascade models do this at the gateway level. The cost levers guide works through the arithmetic.

07

Recommendation

Prices in this guide are a October 2026 snapshot and move each epoch.

Current SayGM pricing (opens in a new tab)